Leaf Development - Plant Ontology Wiki

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1- The initially formed bulge further elongates by mitotic cell divisions throughout the bulge (1-5). 2- Next, at the top of the extended bulge, cells start to divide a single plane causing the bulge to broaden (6). 3- Depending on the species, division activity may decrease or even cease completely (7-9). Thus, the typical irregularly shaped leaf blade of dicots is formed. 4- The lower part of the extended bulge will develop into the leaf stalk or petiole (9).
• Axillary bud primordia are not formed until the leaf primordium is in its second or third plastochrone • In leaf with stipules, small outgrowth are formed on either side of the primordium base. • Palmately compound leaves the leaflet primordia also become evident on the third or fourth plastochrone • In pinnate leaves the pinnae develop from regions of the marginal meristem and their inception is usually delayed until a later plastochrone.
Page 1 and 2: Leaf Development • Several merist
Page 3: M E R I S T E M S
Page 7 and 8: • 3- EXPANSION & SECONDARY MORPHO
Page 9 and 10: This is a vegetative shoot apical m
Page 11 and 12: REGIONS OF THE VEGETATIVE SHOOT MER
Page 13: EXAMPLE cz: central zone pz: periph
Page 16 and 17: 1- Apical meristem 2- Anticlinal di
Page 20: What happens with grasses? • In s
Page 25: Xanthium (Compositae) 1- Leaf primo
Page 29 and 30: • Palisade tissue differentiates
Page 31 and 32: VENATION PATTERNS Dicot: initiated
Page 33 and 34: SENESCENCE AND ABSCISSION (PROMISE:
Page 35 and 36: • The activity of the leaves and
Page 37 and 38: ABSCISSION IS… Basically, it is a
Page 41 and 42: One example: Phaseolus 1- Abscissio
Page 43 and 44: • In plants there several hormone
Page 45: Abscission process…new version ba

Leaf Development - Plant Ontology Wiki

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