空中甘薯嫁接栽培系统结薯关键期叶绿素荧光特性研究

为了分析空中甘薯嫁接栽培系统在块根形成关键过程中的光合能力变化情况,利用MINI-IMAGING-PAM叶绿素荧光仪测定了该时期的叶绿素荧光参数。结果表明,在压蔓0~20 d藤蔓长根期,最大光化学效率（Fv/Fm）和PSII实际光化学效率（YieldⅡ）下降、非光化学猝灭系数（NPQ）升高、表观光合电子传递速率（ETR）先增后降;压蔓20~45 d须根开始膨大,Fv/Fm、YieldⅡ和ETR持续增高,NPQ则先降后增,说明PSII反应中心的能量捕获效率增高,光合能力提高;压蔓45~60 d,光合能力又有降低。...

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Published in西南农业学报 Vol. 28; no. 6; pp. 2475 - 2478
Main Author 李明 蒲志刚 谭文芳 张聪 杨松涛 冯俊彦 屈会娟 王大一 阎文昭
Format Journal Article
LanguageChinese
Published 四川省农业科学院生物技术核技术研究所,四川成都,610066%四川省农业科学院作物研究所,四川成都,610066 2015
Subjects
叶绿素荧光参数
块根
甘薯
空中甘薯
Chlorophyll fluorescence
Storage roots
块根
Grafted overhead-sweetpotato
甘薯
空中甘薯
Ipomoea batatas
叶绿素荧光参数
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ISSN1001-4829
DOI10.16213/j.cnki.scjas.2015.06.024

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Summary:为了分析空中甘薯嫁接栽培系统在块根形成关键过程中的光合能力变化情况,利用MINI-IMAGING-PAM叶绿素荧光仪测定了该时期的叶绿素荧光参数。结果表明,在压蔓0~20 d藤蔓长根期,最大光化学效率（Fv/Fm）和PSII实际光化学效率（YieldⅡ）下降、非光化学猝灭系数（NPQ）升高、表观光合电子传递速率（ETR）先增后降;压蔓20~45 d须根开始膨大,Fv/Fm、YieldⅡ和ETR持续增高,NPQ则先降后增,说明PSII反应中心的能量捕获效率增高,光合能力提高;压蔓45~60 d,光合能力又有降低。
Bibliography:Ipomoea batatas; Grafted overhead-sweetpotato; Chlorophyll fluorescence; Storage roots
To reveal the effects of chlorophyll fluorescence of key stages of storage roots formation in grafted overhead-sweetpotato cultivation（ GOSC） system,the chlorophyll fluorescence was measured in this stage by Chlorophyll fluorescence spectrometer MINI-IMAGING-PAM（ Walz,Germany）. In the stage of 0-20 days after burying stem of fibrous roots growing,the maximal photochemical efficiency（ Fv/ Fm）and the effective quantum yield of photosystem II（ YieldⅡ） decreased,the non-photochemical quenching（ NPQ） increased,and the nonphotochemical quenching（ ETR） increased first then decreased. In the stage of 20- 45 days after burying stem of fibrous roots swollen to storage roots,the Fv/ Fm,YieldⅡand ETR increased continuously,but the NPQ decreased first then increased,indicating the increasing of excitation energy capture by open PS Ⅱ reaction centers of leaves and improving photosynthetic capacity. But 45- 60 days after burying stem,the p
ISSN:1001-4829
DOI:10.16213/j.cnki.scjas.2015.06.024