Ce(Ⅲ)对UV-B胁迫下大豆幼苗光呼吸的影响

中国农业气象

Ce(Ⅲ)对UV-B胁迫下大豆幼苗光呼吸的影响

戴浩;周青;

江南大学环境与土木工程学院,江南大学工业生物技术教育部重点实验室无锡214122,江南大学环境与土木工程学院

出版日期:2008-04-10 发布日期:2008-04-10
基金资助:
国家发改委稀土专项基金(IFZ20051210)

Influence of Cerium (Ce~(3+)) on Photorespiration of Soybean Seedling under Supplementary UV-B Radiation Stress

DAI Hao2,ZHOU Qing1,2(1.Key Laboratory of Industrial Biotechnology,Ministry of Education,Jiangnan University,Wuxi214122 China;2.College of Environment and Civil Engineering,Jiangnan University)

Online:2008-04-10 Published:2008-04-10

摘要/Abstract

摘要： 采用水培法研究Ce(Ⅲ)对紫外辐射(UV-B:0.15Wm-2,0.45Wm-2)胁迫下大豆(Glycine max)幼苗光呼吸速率(Pr)、光合速率(Pn)和叶绿素(Chl)含量的影响。实验结果表明:与CK相比,无UV-B胁迫时20mg.L-1CeC l3能够有效提高Pr和Pn;UV-B处理使Pn与Chl含量降低,Pr增加;Ce+UV-B组的Pr、Pn和Chl含量曲线走势均高于UV-B组。通过对Pr、Pn和Chl含量3项指标研究表明,20mg.L-1CeC l3能提高UV-B胁迫下大豆幼苗的Pr、Pn和Chl含量,通过提高Pr可消耗过多的光能,减轻UV-B辐射对大豆幼苗光合器官的伤害,抑制UV-B辐射胁迫下大豆幼苗Pn的下降,缓解Chl的降解,增强植物的抗逆性。

关键词: Ce(Ⅲ), UV-B辐射, 光呼吸, Chl含量

Abstract: Influence of cerium(Ce3+) on photorespiration rate,photosynthesis rate and chlorophyll content of soybean seedlings exposed to two levels of ultraviolet-B radiation(UV-B,280-320 nm) was studied with hydroponics under laboratory conditions.The results showed that the photorespiration rate effectively increased without UV-B stress;the photosynthesis rate and chlorophyll content decreased caused by UV-B radiation;and all of the indexes with Ce+UV-B treatment were better than those with UV-B treatment,compared with the check as the soybean seedling was pretreated by 20mgL-1CeCl3.The photorespiration rate,photosynthesis rate and chlorophyll content of the soybean seedlings increased by 20mgL-1CeCl3 treatment as stressed under UV-B treatment.By increasing the photorespiration rate,the overplus phoenergy was exhausted.The damage to photosynthetic organs of the soybean seedlings was alleviated,the net photosynthesis rate under UV-B stress decreased,the degradation of chlorophyll was catabolic.Therefore,the resistance of plant to the adversity increased.

Key words: Cerium(Ⅲ), Cerium(Ⅲ), UV-B radiation, Photorespiration rate, Chlorophyll content

戴浩;周青;. Ce(Ⅲ)对UV-B胁迫下大豆幼苗光呼吸的影响[J]. 中国农业气象.

DAI Hao2,ZHOU Qing1,2(1.Key Laboratory of Industrial Biotechnology,Ministry of Education,Jiangnan University,Wuxi214122 China;2.College of Environment and Civil Engineering,Jiangnan University). Influence of Cerium (Ce~(3+)) on Photorespiration of Soybean Seedling under Supplementary UV-B Radiation Stress[J]. Chinese Journal of Agrometeorology.

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