BIOLOGY 3B03 Lecture Notes - Lecture 13: Cellular Differentiation, Auxin, Cytokinin
8 Apr 2018
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These are planned events for the most part. Abscission: is the active separation of the leaf from a branch without injury to the branch. Planned event (not herbivory) and often a seasonal. E(cid:448)e(cid:374) i(cid:374) fall, they do(cid:374)"t usually drop all at once but shed as wave of events. Flo(cid:449)ers that do (cid:374)ot (cid:862)set(cid:863) (cid:894)(cid:374)ot polli(cid:374)ated(cid:895) If lack of water for a period of time, plant may shed parts. Whole aerial part of the plant (top part; e. g. tumbleweed) Senescence is usually a tightly regulated process that can be delineated into phases, some phases are reversible but others are not. Tightly regulated, it has to (cid:271)e as pla(cid:374)t (cid:272)a(cid:374)"t unshed. Plants recapture all that harvested carbon, nitrogen, micronutrients, etc. that would be lose. Plant has to protect itself as it could be a wound for pathogens. Senescence is built into the programming of plant, natural phenomenon. Plants reduce amount of energy going into rosette and puts it into cauline leaves.
