Flower structure of groundnut

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By: thirugene1 (44 month(s) ago)

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Slide 1: 

Floral Biology of Groundnut

Slide 2: 

Sketch of a flower

Slide 3: 

© A.K. Chhabra Field View Groundnuts are also known as goobers, Peanuts, and pincers

Slide 4: 

© A.K. Chhabra Field View Groundnuts are also known as goobers, Peanuts, and pincers

Slide 5: 

Close-up view of crop © A.K. Chhabra

Slide 6: 

© A.K. Chhabra Uprooted plant with pods

Slide 7: 

Close-up of uprooted pods

Slide 8: 

Flowers are born in the axil of leaf Axil of leaf Plant without roots The first flowers appear near the base of each branch, 4 to 6 weeks after planting.

Slide 9: 

The peanut flower is yellowish and about one-half inch in size. There may be one to several flowers in an inflorescence on the plant, but only one opens on one day, and there is an interval of one to several days between the opening of successive flowers Flower

Slide 10: 

Flower

Slide 11: 

Peanut flower has a recurved beaked keel, with two petals fused along the dorsal edges to the apex but open ventrally at the base. Flower

Slide 12: 

Keels Reproductive organs Gynoecium and androecium taken out of keels

Slide 13: 

There is a club-shaped stigma on a tortuous style extending beyond the eight functional and two sterile stamens

Slide 14: 

There is a club-shaped stigma on a tortuous style extending beyond the eight functional and two sterile stamens Close-up Anthers

Slide 15: 

Calyx Corolla

Slide 16: 

© A.K. Chhabra Calyx The calyx has five lobes; in two groups of one and four. They form a narrow sparsely pubescent hypanthium 1 sepal 4 sepals

Slide 17: 

Calyx & Corolla (standard) Calyx Standard

Slide 18: 

Calyx & Corolla Calyx Standard Wings

Slide 19: 

There is a club-shaped stigma on a tortuous style extending beyond the eight functional and two sterile stamens Close-up

Slide 20: 

Parts of corolla Standard Wings Keels There is one standard (largest), two wings (free) and two keels (fused) enclosing reproductive organs. These 5 petals have been separated and shown in this picture.

Slide 21: 

Aerial Portion Under ground Peg After pollination, the flower fades and the ovary elongates to become the peg, which pushes into the soil

Slide 22: 

Pod formation Peg In 7 to 10 weeks, the peg matures into the reticulated pod of one to five edible seeds separated by slight constrictions

Slide 23: 

© A.K. Chhabra Pods of groundnut being uprooted from the soil Pods Pegs

Slide 24: 

© A.K. Chhabra Bunch of pods borne on a plant

Slide 25: 

Reproductive Organs Staminal column Oblong anthers (4) Globular anthers (4) Stigma Non-functional anthers (2)

Slide 26: 

Staminal column Oblong anthers (4) Stigma Non-functional anthers (2) Reproductive Organs Another View Keel Globular anthers (4)

Slide 27: 

Staminal column Oblong anthers (4) Stigma Non-functional anthers (2) Globular anthers (4) Reproductive Organs Another View

Slide 28: 

Pod at physiological maturity Groundnut

Slide 29: 

Mature pods and seeds

Slide 30: 

The End