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- W58935181 abstract "The objectives of this study were to elucidate the physiological basis of selfincompatibilitysystem and the floral morphological polymorphism in carambola(Averrhoa carambola L.).Within 30 minutes after pollination, pollen degradation and hydrationcommenced on the stigma surface. Pollen tubes subsequently emerged from colpalfurrow and crawled into apertures of vesicles. The pollen tubes reached the base ofthe 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 thestyle in pin illegitimate pollinations, however, tubes occasionally penetrated to thebase of the transmitting tract of the style. futhrum illegitimate pollinations, tubeswere inhibited at the junction between stigmatic and stylar tissues. Result ofillegitimate pollination confirmed the partial loss of incompatibility in pin asopposed to the strong incompatibility in thrum as shown by both fluorescencemicroscopic observation and the field controlled pollinations study. Ripen fruitsfrom pin illegitimate pollinations were significantly smaller and contained less seedcompared to legitimate pollinations.Carambola flower consisted of 5 rose-pink sepals, a pistil, 5 stamens and 5staminoids. Pistil length was significantly longer in pin than in thrum morphs. Onthe other hand, the stamen length was significantly longer in thrum than in pinmorphs. Pollen grain shape of pin and thrum morphs was oblate spherical andtricolporate. Pollen diameter was significantly larger in thrum than in pin morphs.Foveolate pattern of pollen exine sculpturing was more intense in pin than in thrummorphs. Each of the five stylar tissues terminated in a capitate stigma. The stigmareceptive surface surrounded the stylar tip, except for a strip along the abaxial partbetween 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 highlysignificant variations even among the various clones within the same morphs." @default.
- W58935181 created "2016-06-24" @default.
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- W58935181 date "1998-01-01" @default.
- W58935181 modified "2023-09-27" @default.
- W58935181 title "Studies on Incompatibility Pollination and Floral Morphological Polymorphism of Carambola (Averrhoa Corambola L)" @default.
- W58935181 hasPublicationYear "1998" @default.
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