Comparison between anthers of two rice (Oryza sativa L.) cultivars with tolerance to high temperatures at flowering or susceptibility
Comparison between anthers of two rice (Oryza sativa L.) cultivars with tolerance to high temperatures at flowering or susceptibility
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DOI：
10.1626/pps.4.36
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发表时间：
2001-03-01
影响因子：
2.5
通讯作者：
Horie, T
中科院分区：
文献类型：
--
作者：
Matsui, T;Omasa, K;Horie, T
水稻品种的花药，cv。在高（耐）花期温度和cv值条件下，雏菊的小花可育性也较好。比较了在高温下表现小花不育性的日光菌（易感）。“日本裸”的花药比“日光”的花药具有较好的开裂空腔和较厚的花药室壁。由于花粉g-雨的膨胀，发育良好的空腔使隔膜容易破裂。较厚的房室壁通过保持花粉室中的水分促进花粉粒的膨胀。由于花粉粒的膨胀是卵膜打开的动力，而隔膜破裂是卵膜开裂不可或缺的过程，因此发育良好的空腔和较厚的室壁可能是Nipponbare耐高温的原因。
Anthers of rice cultivar, cv. Nipponbare, which showed floret fertility even when tire temperature at flowering was high (tolerant) and cv. Hinohikari, which showed floret sterility at high temperatures (susceptible) were compared. The anther of Nipponbare had better developed cavities for dehiscence and thicker locule walls than Hinohikari. The well-developed cavities enable easy rupture of the septa in response to swelling of the pollen g-rains. The thick locule walls promote the swelling of pollen grains by retaining water in the locules. Since the swelling of pollen grains is the driving force to open the theca and the Septum rupture is an indispensable process for the theca dehiscence, the well-developed cavities and the thick locule walls may be responsible for the tolerance to high temperatures in Nipponbare.