中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 不同温度下新铁炮百合幼苗的光合特性及其保护机制 园艺学报 2008,35 (1) 131-136
Position: Home > Articles > Photosynthetic Characteristics and Photoprotective Mechanisms under Vari-ous Temperatures in Lilium ~formolongo Seedlings Acta Horticulturae Sinica 2008,35 (1) 131-136

不同温度下新铁炮百合幼苗的光合特性及其保护机制

作  者：
罗丽兰;石雷;姜闯道;张金政
单  位：
中国科学院植物研究所
关键词：
百合;新铁炮百合;耐热性;气体交换;叶绿素荧光;抗氧化酶
摘  要：
以新铁炮百合的两个主栽品种‘雷山一号’和‘Savaka’为材料,对其幼苗在不同温度下(25℃、32℃、38℃和44℃)的光合特性及光保护机制进行了研究。结果表明,在低于38℃时净光合速率(Pn)下降幅度较小,高于38℃时显著下降。随着处理温度的提高,气孔导度(Gs)呈下降的趋势,胞间二氧化碳浓度(Ci)上升,气孔限制值(Ls)下降。不同处理温度下,两品种叶片最小荧光(Fo)无明显变化,最大荧光(Fm)和光系统Ⅱ(PSⅡ)最大光化学效率(Fv/Fm)下降程度较小。光下PSⅡ实际光化学效率(φPSⅡ)呈持续下降趋势,而非光化学猝灭系数(NPQ)则随处理温度的提高而迅速增加。超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)和过氧化物酶(POD)活性随处理温度升高而提高。本研究表明‘雷山一号’和‘Sayaka’幼苗能够耐受32～38℃的高温;在较高的处理温度下,叶片可以通过提高非光化猝灭和抗氧化酶活性两种机制来保护光合机构免受伤害。
译  名：
Photosynthetic Characteristics and Photoprotective Mechanisms under Vari-ous Temperatures in Lilium ~formolongo Seedlings
作  者：
LUO Li-lan~(1,2) SHI Lei~(1*) JIANG Chuang-dao~1 ZHANG Jin-zheng~1 (1 Institute of Botany,the Chinese Academy of Sciences,Beijing 100093,China;2 Graduate University of the Chinese Academy of Sciences,Beijing 100039,China)
关键词：
lily;;Lilium×formolongo;;heat tolerance;;gas exchange;;chlorophyll fluorescence;;anti-oxi-dant enzyme
摘  要：
Gas exchange,chlorophyll fluorescence and activities of anti-oxidant enzymes were investiga- ted to study the responses of photosynthetic characteristics and photoprotective mechanisms to various tempera- tures(25℃,32℃,38℃and 44℃) in‘Leishan 1’and‘Sayaka’of Lilium xformolongo seedlings.The results showed that the temperatures from 25℃to 38℃led to only slight decrease in photosynthetic rate (Pn),but temperature at 44℃induced a significant reduction in the values of Pn.Along with the decrease in photosynthetic capacity,stomatal conductance(Gs) decreased considerably;during this process,the stom- atal limitation value(Ls) decreased gradually and clearly.The measurement of chlorophyll fluorescence showed that the initial fluorescence yield(Fo) was not effected by the raising temperatures,while the maxi- mum fluorescence yield(Fm) and the maximal quantum yield of photosystemⅡphotochemistry(Fv/Fm) went down slightly with temperature increasing in seedlings of the two lily varieties.The actual efficiency of PSⅡ(ΦPSⅡ) reduced distinctly along with the increase of temperature,while non-photochemical quenching (NPQ) strikingly increased.Moreover,the activities of superoxide dismutase(SOD),ascorbate peroxidase (APX),catalase(CAT) and peroxidases(POD) were enhanced with the temperature increasing.According to the experimental data show that Lilium×formolongo is able to tolerate mild high temperatures;Non-photo- chemical quenching and the anti-oxidant enzymes are the main mechanisms in seedlings of the two lily varie- ties,which can effectively protect its photosynthetic apparatus against high temperatures.

相似文章

导出引用
计量
文章访问数: 7
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46