Effects of UVB radiation and CO_2 atomosphere on growth of rice (oryza sativa L.).

UVB辐射和CO_2气氛对水稻(oryza sativa L.)生长的影响。

基本信息

批准号：
05454127
负责人：
KUMAGAI Tadashi
金额：
$ 4.03万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05454127/
关键词：
UVB radiation CO_2 atmosphere Rice (Oryza sativa)Environment Rubisco content Total leaf nitrogen Chlorophyll content Growth inhibition イネ紫外線UV-B 紫外線抵抗性地球環境品種間差異紫外線

项目摘要

Elevated unfiltered UVB inhibited tiller number, biomass production, plant length, photosynthetic rate and chlorophyll content in rice. UVB effects were alleviated either by elevated CO_2 atmosphere or by exposure to high irradiance-visible radiation. Among 5 Asian rice ecotypes (aus, aman, boro, bulu and tjeleh) from Bengal and Indonesia and Japanese lowland and upland rice groups, the Japanese lowland rice group and the boro ecotype were more resistant. Among Japanese lowland rice cultivars, Sasanishiki exhibited more resistance to UVB,while Norin 1 showed less resistance, although these two cultivars are closely related. It was evident that various cultivars having different sensitivities to UVB were involved in the same ecotype and the same group, and that the resistance of rice to UVB is not simply due to the difference in the geographical situation where rice cultivars are cultivated. The genetic analysis of resistance to UVB effects on growth of rice using F2 plants generated by reciprocally crossing Sasanishiki and Nirin 1 and F3 lines generated by self-fertilizing F2 plants proved that the resistance to UVB was controlled by recessive polygenes. Elevated UVB containing no UVC reduced total leaf nitrogen, soluble protein and Rubisco, while increased in the accumulation of UV-absorbing compounds. There was a cultivar difference in the resistance to UVB effects. The reduction in Rubisco content was less in Sasanishiki, while the increase in the accumulation of UV-absorbing compounds was greater in Sasanishiki. It was thus suggested that the cultivar difference in the resistance to UVB might be due to the difference between Rubisco content and UV-absorbing compounds as influenced by UVB.

升高的未经过滤的UVB抑制了耕种数，生物量的产生，植物长度，光合速率和大米的叶绿素含量。通过升高的CO_2大气或暴露于高辐照度可见的辐射可以缓解UVB效应。在来自孟加拉和印度尼西亚的5种亚洲水稻生态型（Aus，Aman，Boro，Bulu和Tjeleh）中，日本低地稻集团和Boro Ecotype在孟加拉和日本低地和高地大米中都具有更大的抵抗力。在日本低地水稻品种中，Sasanishiki对UVB表现出更大的抵抗力，而Norin 1表现出较小的耐药性，尽管这两个品种密切相关。显然，对UVB具有不同敏感性的各种品种参与了相同的生态型和同一群体，并且大米对UVB的耐药性不仅是由于种植大米品种的地理状况的差异。使用F2植物产生的F2植物产生的F2植物对UVB对水稻生长的影响的遗传分析证明，使用F2植物产生的F3植物证明，对UVB的抗性受到隐性多物的控制。不含UVC的UVB升高可降低总叶氮，可溶性蛋白和Rubisco，同时增加了紫外线吸收化合物的积累。对UVB效应的抗性存在品种差异。 Sasanishiki中Rubisco含量的减少较少，而Sasanishiki的紫外线吸收化合物积累的增加也更大。因此，有人提出，对UVB的抗性的品种差异可能是由于rubisco含量和受UVB影响的紫外线消除化合物之间的差异所致。