Plant Morpho


 

Plant Morpho logoSubject: Biology    Exam: KCET Medical

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Important Concepts in Plant Morpho

Find notes, videos, important points and questions to practice on each of these concepts.

  • Diversity in Angiosperm Morphology

  • Root

  • Stem

  • Leaf

  • Inflorescence

  • Flower

  • Fruit

  • Seeds

  • Fruit and Seed Dispersal

  • Families of Flowering Plants

  • Internal Structure - Meristems

  • Internal Structure - Permanent Tissues

  • Anatomy of Plant Parts

  • Physiology of Plants



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Important Points

The mode of arrangement of petals in floral bud with respect to other members of the same whorl is known as aestivation. When there is no overlapping of margins as in Calotropis and custard-apple, it is called valvate.If one margin of an appendage overlaps that of the next one and so on as in china rose and cotton, it is twisted. There are imbricate and vexillary types of aestivations, too.

The endospermic seeds of castor and custard-apple contain an outer hard, blackish and mottled shell called testa or the seed coat. Castor seed has hygroscopic coruncle.
In basal placentation, the placenta develops at the base of the ovary and bears a single ovule as in the members of Asteraceae family.
The ovary and stigma are connected by a more or less elongated tube, the style. In polycarpellary condition, carpels may be free (apocarpous) as in lotus and rose, or united together (syncarpous) as in tomato and mustard.
 
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