The document describes the parts of a flower including the calyx, corolla, androecium, and gynoecium. It defines the terms actinomorphic and zygomorphic in reference to flower symmetry. It then discusses the two types of pollination - self-pollination and cross-pollination. For self-pollination, it outlines mechanisms like cleistogamy, chasmogamy, bisexuality, and homogamy that promote this. For cross-pollination, it lists mechanisms such as dicliny, dichogamy, heterostyly, herkogamy, self-incompatibility, and male sterility that facilitate cross-pollen
Self-incompatibility refers to the inability of a plant with functional pollen to set seeds when self pollinated. It is the failure of pollen from a flower to fertilize the same flower or other flowers of the same plant.
This presentation includes, Single-locus self-incompatibility- {Gametophytic self-incompatibility (GSI) and Sporophytic self-incompatibility (SSI)},2-locus gametophytic self-incompatibility, Heteromorphic self-incompatibility,Cryptic self-incompatibility (CSI) and Late-acting self-incompatibility (LSI).
Self-incompatibility refers to the inability of a plant with functional pollen to set seeds when self pollinated. It is the failure of pollen from a flower to fertilize the same flower or other flowers of the same plant.
This presentation includes, Single-locus self-incompatibility- {Gametophytic self-incompatibility (GSI) and Sporophytic self-incompatibility (SSI)},2-locus gametophytic self-incompatibility, Heteromorphic self-incompatibility,Cryptic self-incompatibility (CSI) and Late-acting self-incompatibility (LSI).
Plant breeding methods of vegetatively propagated crops Roksana Aftab Ruhi
Vegetatively propagated crops are bred by intentionally crossing of closely or distantly related individual to produce new crop varieties or lines with desirable traits. Breeding of vegetative crops have successfully improved quality, yield, tolerance of crops to environmental pressure. Breeding helps in producing crops that are resistant to viruses, fungi and bacteria and helps in longer storage period for the harvested crop.
The concept and purpose of plant breeding in the modern environmentPaul Gooderham
The concept of plant breeding has been in use since centuries. It is practised across the world by commercial enterprises and government institutions. The increasing requirement of food security has made breeding new crops important.
Plant breeding methods of vegetatively propagated crops Roksana Aftab Ruhi
Vegetatively propagated crops are bred by intentionally crossing of closely or distantly related individual to produce new crop varieties or lines with desirable traits. Breeding of vegetative crops have successfully improved quality, yield, tolerance of crops to environmental pressure. Breeding helps in producing crops that are resistant to viruses, fungi and bacteria and helps in longer storage period for the harvested crop.
The concept and purpose of plant breeding in the modern environmentPaul Gooderham
The concept of plant breeding has been in use since centuries. It is practised across the world by commercial enterprises and government institutions. The increasing requirement of food security has made breeding new crops important.
Plant breeding, its objective and historical development- pre and post mendel...Avinash Kumar
ppt for 1st chapter of plant breeding. it includes defination & objectives of plant breeding, role & challanges of plant breeeders and historical development
Pollination, transfer of pollen grains from the stamens, the flower parts that produce them, to the ovule-bearing organs or to the ovules (seed precursors) themselves. In plants such as conifers and cycads, in which the ovules are exposed, the pollen is simply caught in a drop of fluid secreted by the ovule. In flowering plants, however, the ovules are contained within a hollow organ called the pistil, and the pollen is deposited on the pistil’s receptive surface, the stigma. There the pollen germinates and gives rise to a pollen tube, which grows down through the pistil toward one of the ovules in its base. In an act of double fertilization, one of the two sperm cells within the pollen tube fuses with the egg cell of the ovule, making possible the development of an embryo, and the other cell combines with the two subsidiary sexual nuclei of the ovule, which initiates formation of a reserve food tissue, the endosperm. The growing ovule then transforms itself into a seed.
Modes of Pollination.pptxhsbsbshshs hdhjZackAbukar
Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspects of that system, such as its structure, leadership, program, methods and techniques, resources, and linkages.Definition: Extension approaches can be defined as a style of action, embodying the philosophy of an extension system which, by and large determines the direction and nature/style of the various aspect
For CBSE class 10th and 12
Have you ever wondered why bees are attracted to flowers? Flowers look beautiful and are fragrant, but there is a reason behind this – flowers actually help plants to reproduce. Flowering plants have seeds, carry the genetic information of the parents and develop into a new plant.
Explore pollination notes provided here to learn about the process and types of pollination.
Table of Contents
Pollination
Process
Types
The process of pollination begins when the pollen grains from the respective flowers lands on the stigma and form a pollen tube with the style length, which connects both the stigma and ovary. After the completion of the pollen tube, the pollen grain starts transmitting sperm cells from the grain to the ovary.
Later the process of fertilization in plants will take place when the sperm cells will reach the ovary and egg cells. The seed is then released from the parent plant and making it able to grow into a plant and continue the reproductive cycle with the use of the pollination method.
Presentation Includes very important topics related to Pollination and Double Fertilization in Flowering Plants (Angiosperms). The presentatio will be important for Class XII and X students as well many questions can be asked from the presentation.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
20. The calyx (K): Totality of sepals in the flower.
Calyx with free sepals Calyx with connate (united) sepals:
Stellaria media -chickweed
Rosa spp.
Calyx tube
Calyx lobes
Silene spp.
Fabaceae flower
21.
22.
23. The corolla (C): Totality of petals in the flower
Corolla with free petals Corolla with connate (united) petals
Corolla tube
Corolla lobesPapaver spp.
Ranunculus spp.
Campanula spp.
Digitalis spp.
26. Types of corolla with free petals
Papillonaceaous – Fabaceae (legume family)
27.
28.
29.
30. Androecium (A): Totality of stamens in the flower [ ]♂
“normal” Didynamous
Mint family (Lamiaceae)
Tetradynamous
Cabbage family
Brassicaceae
Monadelphous Malvaceae
Diadelphous: many Fabaceae
31.
32.
33.
34. Gynoecium (G): totality of carpels in the flower [♀]
Inferior ovary superior ovary
Depending on the position of the ovary in relation to the
calyx and corolla:
hypanthium
36. Actinomorphic. Radially symmetric; divisible into two essentially equal
portions along any median longitudinal plane.
Zygomorphic: Bilaterally symmetric; divisible into two essentially equal
portions along only one median longitudinal plane.
Flower symmetry
39. Two types of pollination
Self-pollination :Transfer of pollen grains
within one flower:
40. Mechanism Promoting Self Pollination:
• 1. Cleistogamy: In this case, flowers do not open at all. This ensures complete
self pollination since foreign pollen cannot reach the stigma of a closed flower.
Cleistogamy occurs in some varieties of wheat (Triticum sp), oats (Avena sp),
barley ( H.vulgare) and in a number of other grasses.
41. 2. Chasmogamy:
In some species, the flowers open, but only after pollination has taken place.
This occurs in many cereals, such as wheat, barley, rice and oats. Since the
flowers do open, some cross-pollination may occur.
i) Bisexuality:
Male and female sexual organs present in the same flower e.g Wheat, rice,
groundnut, etc.
ii) Homogamy:
Male and female sexual organs mature at the same time e.g wheat,
groundnut, etc.
42. Genetic Consequences of Self- Pollination
• Self pollination leads to a very rapid increase in homozygosity.
Therefore, populations of self-pollinated species are highly
homozygous.
• Self – pollinated species do not show inbreeding depression, but may
exhibit considerable heterosis. Therefore, the aim of breeding method
generally is to develop homozygous varieties.
44. Mechanism Promoting Self Pollination:
• i) Dicliny (Unisexuality):
It is a condition in which flower is either staminate or pistilate.
• a) Monoecy:
Staminate and pistilate flowers occur in the same plant either in the same
inflorescence. E.g Mango, banana, coconut or in the separate inflorescence.
E.g Maize, Cucurbit, Strawberry, etc.
• b) Dioecy:
The male and female flowers are present on different plants i.e. the in such
species are male or female i.e. sec is governed by a single gene. E.g. Papaya,
hemp, date, palm, etc.
45. ii) Dichogamy:
Anther and stigma of hermaphrodite flower mature at different time, facilitating
cross pollination.
a) Protogyny: Gynoecium matures earlier than the androecium E.g. Bajara.
b) Protandry: Androecium matures earlier than gynoecium. E.g. marigold,
maize, cotton, etc.
iii) Heterostyly: Different length of style and filaments E.g Linseed.
iv) Herkogamy: Presence of physical barrier or mechanical obstacles between
the anther and stigma ensures cross pollination. E.g. Rui (Calotropic gigantia).
v) In lucerne or alfalfa stigma are covered by waxy film and it does not become
receptive unless this waxy film is broken by honeybees.
vi) A combination of two or more of the above mechanism may occurs in some
species, E.g Maize, - Monoecy and Protandry.
46. • vii) Self –Incompatibility: It refers to the failure of pollen from a flower to
fertilize the same flower or other flowers on the some plants. It may be
saprophytic or gametophilic e,g mustard , tobacco, sunflowers, reddish.
• Viii) Male Sterility: It refers to the absence of functional pollen grains in
hermaphrodite flower.
47. Genetic Consequences of Cross Pollination:
1) It preserves and promotes heterozygosity in population.
2) Cross pollinated species shows inbreeding depression and
considerable heterosis.
3) Usually hybrid and synthetic without reducing heterozygosity.