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首页> 外文期刊>Seed Science Research >Water absorption and dormancy-breaking requirements of physically dormant seeds of Schizolobium parahyba (Fabaceae - Caesalpinioideae)
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Water absorption and dormancy-breaking requirements of physically dormant seeds of Schizolobium parahyba (Fabaceae - Caesalpinioideae)

机译：副生Schizolobium parahyba（Fabaceae-Caesalpinioideae）的物理休眠种子的吸水和打破休眠要求

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摘要

Physical dormancy refers to seeds that are water impermeable. Within the Fabaceae, the structure associated with the breaking of dormancy is usually the lens. This study verified the role of the lens in physical dormancy of seeds of Schizolobium parahyba a gap species of Fabaceae from the Atlantic Forest of Brazil. The lens in S. parahyba seeds appeared as a subtle depression near the hilum and opposite the micropyle. After treatment of the seeds with hot water, the lens detached from the coat. Blocking water from contacting the lens inhibited water absorption in hot-water-treated seeds. High constant (30 degrees C) and alternating (20/30 degrees C) temperatures promoted the breaking of physical dormancy and germination in non-scarified seeds. Maximum percentage of germination occurred earlier for seeds incubated at 20/30 degrees C than for those incubated at 30 degrees C. Seeds with a blocked lens did not germinate at alternating or high temperatures. This study suggests that alternating temperatures are probably the cause of physical dormancy break of seeds of S. parahyba in gaps in the forest.
机译：物理休眠是指不透水的种子。在豆科中，与休眠有关的结构通常是晶状体。这项研究证实了晶状体在巴西亚热带短叶菊科的空缺种Schizolobium parahyba种子的物理休眠中的作用。副猪伤寒沙门氏菌种子的晶状体在肺门附近并与菌根相对，表现为细微的凹陷。用热水处理种子后，将镜片从皮上取下。阻止水接触镜片会抑制热水处理过的种子中的水分吸收。较高的恒定温度（30摄氏度）和交替的温度（20/30摄氏度）促进了非钙化种子的物理休眠和发芽的打破。在20/30摄氏度下温育的种子发芽的最大百分比比在30摄氏度下温育的种子发芽的百分数要早。带有隐形眼镜的种子在交替或高温下不会发芽。这项研究表明，交替的温度可能是造成森林间隙中副猪链球菌种子物理休眠中断的原因。

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