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Developmental and morphological responses of rice to elevated atmospheric CO_2 concentration

水稻对大气CO_2浓度升高的发育和形态响应

基本信息

批准号：
14360008
负责人：
HASEGAWA Toshihiro
金额：
$ 6.78万
依托单位：
National Institute for Agro-Environmental Sciences (2003-2004)Hokkaido University (2002)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Growth enhancement of rice by elevated CO_2 can be mediated by the developmental and morphological traits. Much has been studied for the photosynthetic responses but understandings on the effects of elevated CO_2 on morphogenesis of rice are still limited. We therefore attempted to determine the effects of elevated CO_2 (200μmol/mol above ambient) on development and morphology or rice varieties differing in maturity and plant types. Naturally sun-lit growth chambers and free air CO_2 enrichment (FACE) facilities were used for the experiments. Elevated CO_2 advanced heading dates of medium maturing varieties but did not foster development of two early varieties. A contrasting response of lamina length to elevated CO_2 was also observed among the genotypes ; a significant positive effect was found in early varieties but a negative one in medium varieties. The genotypic difference in CO_2 responses of leaf appearance and lamina length occurred mainly in the upper three to four leaves, which developed after panicle initiation. The results suggest that the genotype x CO_2 interaction on the developmental time can influence leaf number and lamina size which have a direct relevance to the rice productivity. We also tested whether genotypic difference in panicle size influences the growth responses to elevated CO_2 using a mutant with limited spikelet number. A parent and its mutant showed a similar growth enhancement due to elevated CO_2 despite the mutant having only 50-60 % of spikelet number per panicle, suggesting that limited spikelet per se does not limit growth enhancement. In all experiments, genotypic variation in photosynthetic responses to elevated CO_2 was mainly due to the difference in leaf greenness or nitrogen content. The results suggest that genotypic variation in growth responses to elevated CO_2 can mostly ascribed to the traits associated with development and nitrogen nutrition.

CO_2升高对水稻生长的促进作用可通过发育性状和形态性状介导。对水稻光合反应的研究较多，但对CO_2升高对水稻形态发生的影响的认识仍然有限。因此，我们试图确定CO_2浓度升高（高于环境浓度200μmol/mol）对不同成熟度和株型水稻品种发育和形态的影响。实验采用自然光照生长室和自由空气CO_2富集（FACE）设备。CO_2浓度升高使中成熟品种的抽穗期提前，但对两个早熟品种的发育没有促进作用。不同基因型叶片长度对CO_2升高的响应也存在差异；在早期品种中发现了显著的正效应，而在中等品种中发现了负效应。叶片外观和叶片长度对CO_2响应的基因型差异主要发生在穗化后发育的上部3 ~ 4叶。结果表明，基因型与CO_2对水稻发育时间的互作影响叶片数和叶片大小，与水稻产量有直接关系。我们还利用一个小穗数有限的突变体，测试了穗大小的基因型差异是否影响对高co2浓度的生长响应。一个亲本及其突变体在CO_2升高的情况下表现出相似的生长促进作用，尽管突变体每穗的小穗数仅为50- 60%，这表明小穗本身的限制并不限制生长促进。在所有试验中，CO_2升高对光合反应的基因型差异主要是由于叶片绿度或氮含量的差异。结果表明，CO_2升高对生长响应的基因型差异主要与发育和氮营养相关性状有关。

项目成果

期刊论文数量（95）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

大気CO_2濃度上昇による水稲の乾物生産促進における品種間差異

大气CO_2浓度增加促进水稻干物质生产的品种间差异

DOI：
发表时间：
2005
期刊：
日本作物学会紀事 74(別1)
影响因子：
0
作者：
下野裕之
通讯作者：
下野裕之

長谷川利拡: "Does elevated CO_2 concentration affect lamina length of rice cultivars?"The 4^<th> International Crop Science Congress. (発表予定). (2004)

Toshihiro Hasekawa：“CO_2 浓度升高会影响水稻品种的叶片长度吗？”第四届国际作物科学大会（即将发表）。

DOI：
发表时间：
期刊：
影响因子：
0
作者：
通讯作者：

Increased rice canopy respiration by elevated CO_2 and its relation to canopy carbon gain.

CO_2 升高增加水稻冠层呼吸及其与冠层增碳的关系。

DOI：
发表时间：
2004
期刊：
The 6^<th> International Symposium on Plant Responses to Air Pollution and Global Changes, Abstracts 261
影响因子：
0
作者：
Sakai H;Hasegawa T;Kobayashi K.
通讯作者：
Kobayashi K.

水稲の出穂の早晩に及ぼす高濃度CO_2の影響

高浓度CO_2对水稻早、晚抽穗的影响

DOI：
发表时间：
2003
期刊：
農業環境工学関連5学会2003年合同(盛岡)大会講演要旨集
影响因子：
0
作者：
Mwaniki M.W.;Mathooko F.M.;Matsuzaki M.;Hiwasa K.;Tateishi A.;Ushijima K.;Nakano R.;Inaba A.;Kubo Y.;岡田益己
通讯作者：
岡田益己

Testing photosynthesis models with measured canopy photosynthesis of rice grown under different CO_2 concentrations

通过测量不同CO_2浓度下生长的水稻冠层光合作用来测试光合作用模型