))t)))))))))t) CHAPTER 4 ACTIVITY 4,2 Plant transport systems) Prelab activity (key concepts))))t) Tracheid)IttI)I)t))l "::rr - ::: .3, ,:: :: :€ 3:cjuced vCE Units 7&2 Student Activv Manual A 2006 $ ithout the permission of the publisher Nelson Australia Pty Ltd
t lntrod uction Vater is an essential requiremenr for photosnthesis ro occur. As photosynthesis mostly occurs , Ieaves of plants, warer and subsrances dissohled in the in it, move ,h.o.rgi vascular plants in the xylem, the roots to the leaes Xriem consists ofhollorv from a cells oftracheids and vessels. Sugars, in the form ofthe disaccharide sucrose and other nurrients move in the phloem. The phloem is made up of sieve a companion cells and cells. Pu rpose To examine ho**arer is transported through a celery stalk and leaves. Materials Each group rvill require: I fJ a srick ofcelery that has been standing in red food dye or eosin for several hours, cut2 cmfrom its It base [l single-edged razor blade e fl microscope, srereo microscope or hand iens a fl microscope slides fl mounted needles (optional) e fl millimetre ruler transverse and longitudinal stem se-ions of Helianthu.r (for Extension Activities). e Procedure e fl R.rnou" rhe celery from the coloured solution. U Examine the stalk and leaves for spread of the dye; holding them up to the light may help. e the areas where the dye is concentrated. Draw observe Observations below. the distribuiion of die in ,n. rlri" eigure 4.2 under e fl cut thin (t mm) transverse sections across the stem and branch (and leaf e if possible). Arrange the sections onto a microscope slide.D E*amine the sections ,,,,d.. loru poer and make diagrams shorving the distribution of the dye. 4D C.,t anorher fresh 1-2 mm piece of stem.fl utt the razor blade to cut out a small piece of rhe area coloured by the dye and put this 4 on aD microscope slide. ur. a couple of razor brades or mounted needles ro rease the piece 4 of tissue apart.E aaa a coverslip, using a drop of water if the tissue is becoming dry. Ic ur. low power, th.., high po-., to find spirai or coils,. Drari, th"se in Figure 4.3. eOhservations +Figure 4.2 Distribution of dye in celery leaf. e 4 € e € € € e4 4 Nelson BioloEt/ vcE lJnits 1&2 student Activity Manuat @ 2006 Nerson Austraria pty Ltd. Not to be reproduced without the permission of the publLher. 5
Figure 4.3 Spirals/coils found in vascular tissue of celery.- .*t s1
e C c The spirals have functions equivalent to those of the spirals of cartilage around the trachea. 7hat are their functions? € e e eConclusion eRefer back to the purpose of this activin- Have you achieved this purpose? Write a conclusion based onwhat you have learnt by undertaking rhis activiry. e e e e e e e e e e e f t f C C C C J J j a J J J Ivebon EblqS/ ,cE Unl6 7&2 st.tddx lffiy lkt d C zffi r€tsfi d.!*r& nll fd. - llot b be r€p.od.Eed riBu.t tte penissin dtE trnGfier.