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
Subjects:	Trees - Pollination Carambola Pollination
Online Access:	http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf
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id	my-upm-ir.10417
record_format	uketd_dc
spelling	my-upm-ir.104172011-04-11T02:15:10Z Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L) 1998 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. Trees - Pollination Carambola Pollination 1998 Thesis http://psasir.upm.edu.my/id/eprint/10417/ http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf application/pdf en public masters Universiti Putra Malaysia Trees - Pollination Carambola Pollination Faculty of Agriculture English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Trees - Pollination Carambola Pollination
spellingShingle	Trees - Pollination Carambola Pollination Fushimi, Nobuhiko Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)
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
qualification_level	Master's degree
author	Fushimi, Nobuhiko
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)
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Agriculture
publishDate	1998
url	http://psasir.upm.edu.my/id/eprint/10417/1/FP_1998_7_A.pdf
_version_	1747811117212631040

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

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