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by: Elaina Gorczany


Elaina Gorczany
GPA 3.6

Jerry Bennett

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Jerry Bennett
Class Notes
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This 9 page Class Notes was uploaded by Elaina Gorczany on Friday September 18, 2015. The Class Notes belongs to AGR 4512 at University of Florida taught by Jerry Bennett in Fall. Since its upload, it has received 40 views. For similar materials see /class/206612/agr-4512-university-of-florida in Agricultural & Resource Econ at University of Florida.

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Popular in Agricultural & Resource Econ




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Date Created: 09/18/15
CHAPTER 11 VEGETATIVE GROWTH Vegetative organs have origins in the apical and lateral buds of shoots starting with the embryo axis in the seed Leaf axils contain lateral or axillary buds New growth can also arise from adventitious buds that may form in the stem cambium or the root pericycle PHYTOMER STRUCTURAL SUBUNIT OF GRASSES Phytomer structural subunit has three components 1 stem node and internode 2 leaf and leaf sheath 3 axillary bud l Baal ha Blade wade TA 4erV00 E 19quot As 14 Von Some Definitions Stems consist or Internoaes between tne noaes with attached leaves No nodes No internodes No leaves Crown a number of internodes that have not expanded and remain at or slightly beneath the soil surface Lower closely spaced nodes at or just below the soil surface In grasses the crown gives rise to adventitious roots Pseudostem roll of older leaves that forms the stem like structure during early vegetative growth Grass leaf consists of leaf blade and leaf sheath Leaf sheath is connected one node below where the blade appears Liule Membranous tissue separating the leaf blade and leaf sheath 25 ME Lea 1L A laole Leaf A ali Growing Points agrowing points baxilary buds maize soybean l 5 leaf rawMod Pseudostem until about 8 fully developed leaves 40 cm height Aerial Stem Fig 111 Typical vegeta live and floral buds of a grass plant Bud ol 39 aerlaJ JeJnvl 39n Hillm Bl Apical bud of rhizome or rhizome branch Vegeta tive shoot apex of oat Inflorescence initial of oat al the 4Ieai stage E In florescence primordium of oat at the 6le39al stage Homomorphio structures in an i 39 1 primordial leaves 2 and 3 expanding young leaves of an aerial shoot or expand ing calaphylls of a rhizome 4 and 5 mature leaf War We p y g unexpand e d hod C D inlern de 7 axillary Bud B and expanding internode o arhzgme a r 3 aerial shoot inlernodes of A 1 R temperate grasses do not elongate until after initia tion of an in orescence prml 5 velelum 5 in D139 1 gt 1 W m tamquot emfWm 0 e w w 271 l an iv e 7 IPM 439 h 7c raww Oat Growrn Pornt ro ressrn from ve etative to re roductive structure 1 growing point 2 3 primordial leaves 4 5 expanding young leaves 6 mature leaf sheath 7 unexpanded node 8 axillary bud 9 expanding internode


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