ven2lec8_(anatomylec)

ven2lec8_(anatomylec) - VEN 2 Morphology and Anatomy...

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Unformatted text preview: VEN 2 Morphology and Anatomy Lecture Shoot system of V. vinifera Juvenile (derived from a seed) it has no tendrils and the phyllotaxy is 2/5 (the angle between successive leaves is ~ 145 [spiral]). This phase is short lived it will last no more that 10 - 15 nodes. The shoot will then revert to the adult form. Shoot system of V. vinifera Adult this form of shoot is representative of all other shoots. There are discontinuous tendrils and the phyllotaxy is distichous (the angle between successive leaves is 180 , i.e. the leaves are opposite to one another [bilaterally symmetrical]). Under vegetative propagation the adult shoot morphology persists. Long. section of shoot apex Long. section of shoot apex Apical Meristem Tu Corp RM D L1 T1 Longitudinal section of the apical meristem Long. section of apical 6 nodes Long. section of apical 6 nodes Apical Meristem L2 L1 L3 L5 T4 Axil Mer 5 T3 L4 T5 Longitudinal Section of the apical 6 nodes L = leaf, T = tendril, Axil Mer = Axillary meristem The primary bud, inside the compound, contains the same morphological features as the adult shoot. Morphology of the apex of the shoot Current Seasons shoot growth: Fixed growth elongation of nodes already present in the bud Free growth new nodes produced by the apical meristem Shoots apical meristem The apical meristem is involved in A.) organ formation ( organogenesis ) which includes leaf, tendril and inflorescence primordia and B.) tissue formation ( histogenesis ). APICAL MERISTEM SHOOT TIP Shoot Tip Leaf Primordia Apical meristem Anatomy of main axis of shoot Two components bark and wood Bark contains the phloem: tissue involved in the translocation of carbohydrates, other organic molecules and water. Wood contains the xylem: tissue involved in the transport of water and also gives structure to the vine. Anatomy of main axis of shoot Cambium (vascular cambium) is a generative layer for both the bark and wood....
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This note was uploaded on 09/29/2010 for the course VEN 81437 taught by Professor Larrywilliams during the Fall '10 term at UC Davis.

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ven2lec8_(anatomylec) - VEN 2 Morphology and Anatomy...

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