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Assessment of stigma receptivity via papillar integrity in Kigelia pinnata (Bignoniaceae)

Assessment of stigma receptivity via papillar integrity in Kigelia pinnata (Bignoniaceae) The stigma of Kigelia pinnata is spathulate, wet and sensitive to touch. Consisting of two flaps or folds, the inner surface of these stigmatic flaps is papillate. Covered by a prominent papillar zone, each papilla contains lipid and phenolic deposits which remain entrapped below the thick cuticle till the stigma attains receptivity. Gradual unfolding of stigmatic flaps; about 1 h post anthesis, marks the beginning of stigma receptivity. Reaching a peak at 24 h after anthesis, the stigma remains receptive for 48 h. Papillae gradually lose turgidity after 72 h post anthesis and liberate their contents into the outside medium. During this time, stigma receptivity declines sharply as can be made out from the germination of only 10% pollen. Thereafter, none of the pollen deposited on the stigma germinates. The papillar phenology exhibits a close coordination with stigma receptivity indicating that both the processes are proportionately related to each other. Therefore, evaluation of papillar integrity can be used as a quick method to check stigma receptivity in K. pinnata. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of the National Academy of Sciences, India Section B: Biological Sciences Springer Journals

Assessment of stigma receptivity via papillar integrity in Kigelia pinnata (Bignoniaceae)

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References (26)

Publisher
Springer Journals
Copyright
Copyright © 2018 by The National Academy of Sciences, India
Subject
Life Sciences; Life Sciences, general; Behavioral Sciences; Plant Biochemistry; Nucleic Acid Chemistry
ISSN
0369-8211
eISSN
2250-1746
DOI
10.1007/s40011-018-0999-4
Publisher site
See Article on Publisher Site

Abstract

The stigma of Kigelia pinnata is spathulate, wet and sensitive to touch. Consisting of two flaps or folds, the inner surface of these stigmatic flaps is papillate. Covered by a prominent papillar zone, each papilla contains lipid and phenolic deposits which remain entrapped below the thick cuticle till the stigma attains receptivity. Gradual unfolding of stigmatic flaps; about 1 h post anthesis, marks the beginning of stigma receptivity. Reaching a peak at 24 h after anthesis, the stigma remains receptive for 48 h. Papillae gradually lose turgidity after 72 h post anthesis and liberate their contents into the outside medium. During this time, stigma receptivity declines sharply as can be made out from the germination of only 10% pollen. Thereafter, none of the pollen deposited on the stigma germinates. The papillar phenology exhibits a close coordination with stigma receptivity indicating that both the processes are proportionately related to each other. Therefore, evaluation of papillar integrity can be used as a quick method to check stigma receptivity in K. pinnata.

Journal

Proceedings of the National Academy of Sciences, India Section B: Biological Sciences – Springer Journals

Published: Jun 4, 2018

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