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Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)

The objectives of this study were to elucidate the physiological basis of selfincompatibility system and the floral morphological polymorphism in carambola (Averrhoa carambola L.). Within 30 minutes after pollination, pollen degradation and hydration commenced on the stigma surface. Pollen tubes...

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Main Author: Fushimi, Nobuhiko
Format: Thesis
Language:English
English
Published: 1998
Online Access:http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf
http://psasir.upm.edu.my/id/eprint/10417/
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spelling my.upm.eprints.104172011-04-11T02:15:10Z http://psasir.upm.edu.my/id/eprint/10417/ Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L) Fushimi, Nobuhiko The objectives of this study were to elucidate the physiological basis of selfincompatibility system and the floral morphological polymorphism in carambola (Averrhoa carambola L.). Within 30 minutes after pollination, pollen degradation and hydration commenced on the stigma surface. Pollen tubes subsequently emerged from colpal furrow and crawled into apertures of vesicles. The pollen tubes reached the base of the transmitting tract of the style on legitimate pollinations in pin and thrum morphs at 8.0 h after pollinations. Pollen tubes were uniformly inhibited at the middle of the style in pin illegitimate pollinations, however, tubes occasionally penetrated to the base of the transmitting tract of the style. futhrum illegitimate pollinations, tubes were inhibited at the junction between stigmatic and stylar tissues. Result of illegitimate pollination confirmed the partial loss of incompatibility in pin as opposed to the strong incompatibility in thrum as shown by both fluorescence microscopic observation and the field controlled pollinations study. Ripen fruits from pin illegitimate pollinations were significantly smaller and contained less seed compared to legitimate pollinations. Carambola flower consisted of 5 rose-pink sepals, a pistil, 5 stamens and 5 staminoids. Pistil length was significantly longer in pin than in thrum morphs. On the other hand, the stamen length was significantly longer in thrum than in pin morphs. Pollen grain shape of pin and thrum morphs was oblate spherical and tricolporate. Pollen diameter was significantly larger in thrum than in pin morphs. Foveolate pattern of pollen exine sculpturing was more intense in pin than in thrum morphs. Each of the five stylar tissues terminated in a capitate stigma. The stigma receptive surface surrounded the stylar tip, except for a strip along the abaxial part between the middle and base of stylar tissues. Vesicle was a dewdrop-shaped cell. Stigma and vesicles sizes were significantly greater in pin than in thrum morphs. Result of measurements of the various floral morphological parts revealed highly significant variations even among the various clones within the same morphs. 1998 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf Fushimi, Nobuhiko (1998) Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L). Masters thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The objectives of this study were to elucidate the physiological basis of selfincompatibility system and the floral morphological polymorphism in carambola (Averrhoa carambola L.). Within 30 minutes after pollination, pollen degradation and hydration commenced on the stigma surface. Pollen tubes subsequently emerged from colpal furrow and crawled into apertures of vesicles. The pollen tubes reached the base of the transmitting tract of the style on legitimate pollinations in pin and thrum morphs at 8.0 h after pollinations. Pollen tubes were uniformly inhibited at the middle of the style in pin illegitimate pollinations, however, tubes occasionally penetrated to the base of the transmitting tract of the style. futhrum illegitimate pollinations, tubes were inhibited at the junction between stigmatic and stylar tissues. Result of illegitimate pollination confirmed the partial loss of incompatibility in pin as opposed to the strong incompatibility in thrum as shown by both fluorescence microscopic observation and the field controlled pollinations study. Ripen fruits from pin illegitimate pollinations were significantly smaller and contained less seed compared to legitimate pollinations. Carambola flower consisted of 5 rose-pink sepals, a pistil, 5 stamens and 5 staminoids. Pistil length was significantly longer in pin than in thrum morphs. On the other hand, the stamen length was significantly longer in thrum than in pin morphs. Pollen grain shape of pin and thrum morphs was oblate spherical and tricolporate. Pollen diameter was significantly larger in thrum than in pin morphs. Foveolate pattern of pollen exine sculpturing was more intense in pin than in thrum morphs. Each of the five stylar tissues terminated in a capitate stigma. The stigma receptive surface surrounded the stylar tip, except for a strip along the abaxial part between the middle and base of stylar tissues. Vesicle was a dewdrop-shaped cell. Stigma and vesicles sizes were significantly greater in pin than in thrum morphs. Result of measurements of the various floral morphological parts revealed highly significant variations even among the various clones within the same morphs.
format Thesis
author Fushimi, Nobuhiko
spellingShingle Fushimi, Nobuhiko
Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
author_facet Fushimi, Nobuhiko
author_sort Fushimi, Nobuhiko
title Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
title_short Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
title_full Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
title_fullStr Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
title_full_unstemmed Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
title_sort studies on incompatibility pollination and floral morphological polymorphism of carambola (averrhoa corambola l)
publishDate 1998
url http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf
http://psasir.upm.edu.my/id/eprint/10417/
_version_ 1643824598501818368
score 13.211869

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