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中国农学通报 ›› 2020, Vol. 36 ›› Issue (20): 23-27.doi: 10.11924/j.issn.1000-6850.casb19040043

所属专题: 水稻

• 生物科学 • 上一篇    下一篇

光照强度对水稻HS叶片失绿的影响

吕冬煦1, 倪海瑞1, 曾彦达2()   

  1. 1南京师范大学附属中学,南京 210003
    2江苏省农业科学院粮食作物研究所,南京 210014
  • 收稿日期:2019-04-11 修回日期:2019-10-11 出版日期:2020-07-15 发布日期:2020-07-20
  • 通讯作者: 曾彦达
  • 作者简介:吕冬煦,女,2001年出生,江苏南京人。Tel:025-84390836,E-mail:2594115543@qq.com。
  • 基金资助:
    国家自然科学基金资助项目“水稻光氧化相关基因LPO1的图位克隆、分子机理和生理功能”(31671663)

Light Intensity: Effects on Leaf Chlorosis of Rice HS

Lv Dongxu1, Ni Hairui1, Zeng Yanda2()   

  1. 1Middle School Affiliated to Nanjing Normal University, Nanjing 210003
    2Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014
  • Received:2019-04-11 Revised:2019-10-11 Online:2020-07-15 Published:2020-07-20
  • Contact: Zeng Yanda

摘要:

通过遮去不同光照强度和高温处理对水稻HS叶片叶绿素含量影响效应的试验,拟验证是强光而非高温是产生叶片失绿的原因,并探明可以消除叶片失绿(黄化)的遮光比例。结果表明,在自然光强条件下,水稻HS的叶片叶绿素含量在分蘖期急剧降低而发生叶片失绿,而遮去自然光强3/4和2/4(相同气温条件下)处理的叶绿素含量变化很小,无明显的叶片失绿现象。处理1个月后再恢复自然光强,原来由于遮光而没有明显失绿的叶片曝露在自然强光下后也出现明显的失绿,再次证实叶片失绿是由于强光引起。遮去自然光强的2/4以上,可基本消除HS的叶片失绿和光氧化现象。高温(中等和较弱光强下)并不会导致HS叶绿素含量和叶色发生明显变化。

关键词: 水稻, 叶绿素, 失绿, 光氧化, 光强

Abstract:

The experiments on leaf chlorophyll content of shading and high temperature of rice HS was carried out to verify that strong light, rather than high temperature, was the cause of leaf chlorosis (yellowing), and to confirm the shade rate of eliminating leaf chlorosis (yellowing). The results showed that: under the condition of natural light intensity, the leaf chlorophyll content of rice HS during the tillering stage dramatically decreased, resulting in chlorosis; however, when 3/4 or 2/4 of the natural light intensity (under the same temperature condition) was removed, the leaf chlorophyll content showed little change and no obvious leaf chlorosis was observed; when the natural light intensity was restored for those plants which were shaded for one month but did not show leaf chlorosis, the plants also started to show detectable leaf chlorosis, confirming that the leaf chlorosis was caused by strong light intensity. When more than 2/4 of the natural light intensity was removed, the leaf chlorosis and photooxidation of HS were not detectable. High temperatures (under medium and weaker light) do not cause significant changes in the chlorophyll content and leaf color of rice HS.

Key words: rice, chlorophyll, chlorosis, photooxidation, light intensity

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