Skip to main content
UploadLanguage (EN)Support
BusinessMobileSocial MediaMarketingTechnologyArt & PhotosCareerDesignEducationPresentations & Public SpeakingGovernment & NonprofitHealthcareInternetLawLeadership & ManagementAutomotiveEngineeringSoftwareRecruiting & HRRetailSalesServicesScienceSmall Business & EntrepreneurshipFoodEnvironmentEconomy & FinanceData & AnalyticsInvestor RelationsSportsSpiritualNews & PoliticsTravelSelf ImprovementReal EstateEntertainment & HumorHealth & MedicineDevices & HardwareLifestyle
Ivana Damnjanović, profile picture
Uploaded byIvana Damnjanović
PPT, PDF15,642 views

Biljna tkiva

Plant tissues fall into two categories: meristematic and permanent tissues. Meristematic tissues, like apical and lateral meristems, allow for growth through cell division. Apical meristems cause primary growth in shoots and roots as cells divide and elongate. Permanent tissues, such as parenchyma, collenchyma, and sclerenchyma, take on mature forms to carry out functions like photosynthesis, storage, and structural support. Parenchyma is one of the most common permanent tissues found throughout plant organs.

Education◦
Downloaded 67 times
Plant Tissues Damnjanović Ivana
Internal Organization of the Plant Body  Tissue- a group of similar cells organized into a structural and functional unit.  Tissue System- a tissue or group of tissues organized into a structural and functional unit; larger units of the plant body.
Plant Tissues fall into two large categories: Meristematic, or Permanent (Non-Meristematic) Plant Tissues
Meristematic Tissues  Meristems are places in plants where cell division is occurring.  During cell division, one cell becomes two cells.  Each new cell can also divide.
Meristematic Tissues  In this class we will discuss three kinds of meristems:  Apical Meristems  Intercalary Meristems  Lateral Meristems
Apical Meristems  Primary growth of shoots and roots occurs as the cells of the apical meristem divide and elongate.
Shoot Apical Meristem
Root Apical Meristem Root cap  Apical meristems cause PRIMARY GROWTH.  As cells in apical meristems divide and elongate, shoot tips and root tips grow longer. This increase in length is called primary growth.
Lateral Meristems – secondary growth in woody plants Basswood – root in cross section Basswood – stem in cross section; 1, 2, 3 year old stems
Intercalary Meristems Monocots, like grasses, have intercalary meristems which allow the leaves to grow back after mowing.
Permanent tissues Tissues that attained their mature form and perform pacific functions. They stop dividing Types: • Simple permanent tissues • Complex permanent tissues
1. Parenchyma - cells are rounded in shape & have uniformly thin walls found in all parts of the plants. - living at maturity, have large vacuoles - location Ieaf, stem (pith), roots, fruits Functions: *basic metabolic function (respiration, photosynthesis (chIorenchyma in Leaf) *storage (potatoes, fruits, & seeds) *wound healing and regeneration Simple permanent tissues
ChIorenchyma - A specialized parenchyma tissue found in the green parts of the shoot and performs photosynthesis. ChIorenchyma ­ differentiate from parenchyma cells & are alive at maturity
 Arenchyma is the parenchyma in which the cells enclose large intercellular spaces that are filled with air. It is characteristically found in aquatic floating plants. Arenchyma
 Storage of starch, protein, fats, oils and water in roots, tubers (e.g. potatoes), seed endosperm (e.g. cereals) and cotyledons Storage parenchyma
Rhizodermis -absorption
Supporting ground tissues
Collenchyma Collenchyma Elongate in shape. Occur beneath the epidermis in young stems. Support young growing tissues.
Sclerenchyma- fibers and sclereids. Long or stellate in shape. Occur throughout the plant body. Support (strengthen) and storage. Sclerenchyma
Sclerenchyma SCLERIDS FIBERS