不同光周期对丝瓜幼苗生长生理及其内源激素含量和性别分化的影响
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引用本文:吴雪霞,尚 静,张圣美,朱宗文,张爱冬,查丁石.不同光周期对丝瓜幼苗生长生理及其内源激素含量和性别分化的影响[J].西北植物学报,2019,39(10):1812~1818
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吴雪霞1,2,尚 静1,2,张圣美1,2,朱宗文1,2,张爱冬1,2,查丁石1,2* (1 上海市农业科学院 园艺研究所上海 201403
2 上海市设施园艺技术重点实验室上海 201403) 
基金项目:国家大宗蔬菜体系(CARS 25);
中文摘要:以该课题组自主选育的普通丝瓜(BG 1 1 3 1)为材料,采用人工遮光的方式,研究不同光周期[6、8、10和14 h/d(自然光周期,CK)]处理对丝瓜幼苗生长生理及其内源激素含量和性别分化的影响,为丝瓜设施栽培中的光照管理提供理论基础。结果表明:(1)随着光周期的缩短,丝瓜幼苗生物量的积累呈显著减少的趋势;幼苗叶片叶绿素含量,SOD、POD和CAT活性,以及可溶性糖、可溶性蛋白和游离氨基酸含量均呈先升高后降低的趋势,并均以光周期为10 h/d时最高。(2)丝瓜幼苗叶片GA3、IAA和ZT含量在光周期为8和10 h/d时较低,而在光周期为6和14 h/d时较高,但ABA含量变化趋势却相反。(3)当光周期为10 h/d时,丝瓜的第一雌花节位、第一雄花节位均最低,雌花总数和果实产量最高。研究发现,适当的短日处理可以促进丝瓜雌花的分化和果实产量提高,并以光周期10 h/d处理的效果最佳。
中文关键词:光周期  普通丝瓜  幼苗生长  内源激素  性别分化
 
Effect of Different Photoperiods on Plant Growth, Contents of Endogenous Hormones and Floral Sex Differentiation of Luffa cylindrica in Seedling Stage
Abstract:The effects of different photoperiod treatments (6, 8, 10 and 14 h/d) on the plant growth, endogenous hormones contents, and sex differentiation of luffa (Luffa cylindrica Roem.) seedling were studied by artificial shading method, which will provide the theoretical basis for artificial light regulation of this plant species. The results showed that: (1) with the extension of the photoperiod, the plant biomass was increased gradually. The total Chl a+b contents, SOD, POD and CAT activities, soluble sugar, soluble protein and free amino contents were first increased, then decreased, and reached to maximum under the treatment of 10 h/d. (2) The GA3, IAA, ZT contents of 8 and 10 h/d were lower than those of 6 and 14 h/d, the ABA contents were the contrary. (3) The 1st female and male flowers of 10 h/d were the lowest, the number of female flowers and yield were the highest of all photoperiod treatments. Overall, 10 h/d photoperiod was more beneficial to the growth and cultivated health seedling of luffa.
keywords:photoperiod  luffa (Luffa cylindrica Roem.)  plant growth  endogenous hormones  sex differentiation
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