Mechanisms of abundance decline and potential responses to climate warming in C3 grass species

C3草种丰富度下降的机制和对气候变暖的潜在反应

• 批准号: 15380181
• 负责人: SUGIYAMA Shuichi
• 金额: $ 9.66万
• 依托单位: Hirosaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15380181/
• 关键词: climate warming; C3 grasses; abundance decline; photosynthetic rate; heat stress; genetic variation; 牧草; 衰退; 光合成温度反応; クロロフィル蛍光; 光化学系II; アイソザイム; 温暖化; オーチャードグラス; 種内変異; 繁殖; 生長

(1)Although the perennial grass Dactylis glomerata L.has established dominant populations in Japan since the first introduction in the 1870s', its abundance shows a marked reduction in the southern part of Tohoku regions. In this study, mechanisms of abundance decline and potential responses to climate warming of the naturalized populations of D.glomerata.(2)Abundancs of naturalized populations of D.glomerata were measured in 43 sites of Tohoku and Kantoh regions and their relationships with climate factors were examined. There were highly positie correlation between abundance and maximum temperature in September, which suggests that abundance decline is closely related to duration of hot climate rather than by highest temperature of mid summer.(3)Photosynthetic efficiency of light response and dark response were measured by A-Ci curve during 26℃ to 40℃ at two degree intervals. The decline of Jmax, which represent the maximum efficiency of light reaction, showed a large decline with increasing temperature, but no deline was found for Jcmax, which is the maximum efficiency of dark reaction. These results show that decline of photosynthesis under heat stress is caused by decreased function of light harvesting or light transfer reactions.

(1)尽管多年生草本鸭茅自 1870 年代首次引入以来已在日本建立了优势种群，但其丰度在东北地区南部显着减少。在本研究中，丰度下降的机制和潜力。 (2)东北、关东地区43个地点的石竹归化种群丰度及其分布情况考察了丰度与9月份最高气温之间的高度正相关关系，表明丰度下降与炎热气候的持续时间密切相关，而不是与仲夏最高气温密切相关。(3)光响应的光合效率。通过A-Ci曲线在26℃至40℃以两度间隔测量暗响应，代表光反应最大效率的Jmax随着温度的升高呈现出较大的下降，但没有发现Jcmax的界限。 ，这是这些结果表明，热应激下光合作用的下降是由光捕获或光转移反应功能下降引起的。

项目成果

Sugiyama S.: "Geographical distribution and phenotypic differentiation in populations of Dactylis glomerata L. in Japan"Plant Ecology. 169. 295-305 (2003)

Sugiyama S.：“日本鸭茅种群的地理分布和表型分化”植物生态学。

Allelotype of a ripening-specific 1-aminocyclopropane-J-carboxylate synthase gene defines the rate of fruit drop in apple

成熟特异性 1-氨基环丙烷-J-羧酸合酶基因的等位基因型决定了苹果的落果率

• 发表时间: 2004
• 期刊: J.Amer.Soc.Hort.Sci. 129
• 作者: Sato T.;Harada T.et al.
• 通讯作者: Harada T.et al.

Variation in nuclear DNA content in natural populations of orchardgrass (Dactylis glomerata L.) in the eastern part of Hokkaido, Japan.

日本北海道东部果园草 (Dactylis glomerata L.) 自然种群核 DNA 含量的变化。

• 发表时间: 2003
• 期刊: Grassland Science 49
• 作者: Sugiyama S.;Yamada T
• 通讯作者: Yamada T

Characteristeics of progeny plants originating from asymmetric somatic cell hybridization of birdfot trefoil and rice

三叶草与水稻不对称体细胞杂交后代植物的特性

• 发表时间: 2005
• 期刊: Breeding Science 55
• 作者: Saito;M.;M.Senda;R.Ishikawa;Akada;S.;T.Harada;M.Nizeki
• 通讯作者: M.Nizeki

Geographic distribution and phenotypic differentiation in population of Dactylis glomerata L. in Japan.

日本鸭茅种群的地理分布和表型分化。

• 发表时间: 2003
• 期刊: Plant Ecology 169
• 作者: Sato T.;Harada T.et al.;Sugiyama S.
• 通讯作者: Sugiyama S.