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首页> 美国卫生研究院文献>Plant Physiology >Effects of Gibberellic Acid and Gold Light on Germination Enzyme Activities and Amino Acid Pool Size in a Dwarf Strain of Watermelon
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Effects of Gibberellic Acid and Gold Light on Germination Enzyme Activities and Amino Acid Pool Size in a Dwarf Strain of Watermelon

机译：赤霉素和金光对西瓜矮化品种发芽酶活性和氨基酸库大小的影响

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摘要

Gibberellic acid (GA3) promotes and continuous gold light inhibits germination of seeds of a dwarf strain (WB-2) of watermelon [Citrullus lanatus (Thunb.) Matsu. and Nakai]. Osmotic inhibition of germination with mannitol in light-grown seeds of WB-2 was only slightly reversed by GA3 at the concentrations used, whereas, GA3 substantially relieved osmotic inhibition in dark-grown seeds.The effects of GA3 and gold light on development of catalase and invertase activities and on levels of free amino acids in germinating seeds of WB-2 were examined. Light depressed development of catalase and invertase activity. Levels of free amino acids increased more slowly in embryonic axes of light- than dark-incubated seeds, but in cotyledons higher levels of amino acids were maintained in light-grown seeds. GA3 accelerated the development of catalase activity in whole embryos and invertase activity in embryonic axes, but did not significantly affect invertase activity in cotyledons during germination. GA3 had little effect on amino acid pools in cotyledons and embryonic axes.
机译：赤霉素（GA3）促进并且持续不断的金光抑制西瓜[Citrullus lanatus（Thunb。）Matsu）矮株（WB-2）种子的发芽。和中井]。在所使用的浓度下，GA3仅能轻微抑制WB-2轻度生长种子中甘露醇对发芽的渗透抑制作用，而GA3基本上缓解了深色生长种子中的渗透抑制作用。GA3和金光对过氧化氢酶发育的影响。检测了WB-2发芽种子中的转化酶活性和游离氨基酸水平。轻度抑制过氧化氢酶和转化酶活性的发展。在光明种子的胚轴中，游离氨基酸的含量比在黑暗中培育的种子的增长更慢，但是在子叶中，在光生种子中，氨基酸的含量更高。 GA3促进了整个胚中过氧化氢酶活性的发展和胚轴中转化酶的活性，但在发芽过程中并未显着影响子叶的转化酶活性。 GA3对子叶和胚轴的氨基酸库影响很小。

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