摘要
【目的】探明干旱胁迫对冬播马铃薯现蕾期叶绿素荧光参数的影响。【方法】以云南省主栽的马铃薯品种合作88、丽薯6号、宣薯2号及会-2为试验材料,在冬播马铃薯现蕾期测定干旱胁迫和对照处理的各马铃薯品种的叶绿素荧光参数,并对各叶绿素荧光指标变幅进行模糊隶属函数分析。【结果】冬播马铃薯在现蕾期干旱胁迫下,4个马铃薯品种的叶绿素a、叶绿素b、叶绿素a/b、电子传递效率(ETR)、实际光化学量子产量(Fv′/Fm′)、光化学猝灭系数(q P)、最大荧光(Fm)、可变荧光(Fv)和最大光化学量子效率(Fv′/Fm′)均较对照(CK)处理降低,但初始荧光(F0)、非光化学猝灭系数(q N)较CK处理增加;供试的4个马铃薯品种在干旱胁迫条件下,与未经干旱处理的对照组Fv′/Fm′值均小于Fv′/Fm′;4个马铃薯品种抗旱性由强到弱依次是:会-2>宣薯2号>合作88>丽薯6号。【结论】现蕾期干旱胁迫对冬播马铃薯叶绿素荧光参数的影响因品种而异。
[Purpose]To understand the effects of drought stress on the chlorophyll fluorescence parameters at the squaring stage of winter potatoes.[Method]Hezuo88,Lishu6,Xuanshu2 and Hui-2 planted in Yunnan Province were used as the experimental materials.The chlorophyll fluorescence parameters of every potato varieties were determined in winter sowing at squaring stage under drought stress and contrast treatment and the fuzzy membership function value of all chlorophyll fluorescence indexes change range were analyzed.[Result]Chlorophyll a,chlorophyll b,chlorophyll a/b,the electron transport rate(ETR),efficiency of open centers of PSⅡ(Fv′/Fm′),photochemical quenching coefficient(qP),the maximum fluorescence(Fm),variable fluorescence(Fv)and maximal photochemical efficiency of PSⅡ(Fv/Fm)of four potato varieties under drought stress at squaring stage in winter sowing were lower than contrast treatment(CK),but the initial fluorescence(F0)and non-photochemical quenching coefficient(qN)were increased.The Fv′/Fm′from the tested four potato varieties under drought stress condition was lower than that under no drought stress condition.Drought resistance rank of four potato cultivars was Hui-2>Xuanshu2>Hezuo88>Lishu6.[Conclusion]The effects of drought stress at squaring stage on chlorophyll fluorescence parameters of potato in winter sowing were different from the varieties.
作者
尹智宇
韩德鹏
封永生
翁大成
许从恩
肖关丽
YIN Zhiyu;HANG Depeng;FENG Yongsheng;WENG Dacheng;XU Congen;XIAO Guanli(College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming 650201,China;Yuanjiang Agricultural Technology Extension Station,Yuanjiang 650033,China)
出处
《云南农业大学学报（自然科学版）》
CSCD
北大核心
2018年第4期605-610,共6页
Journal of Yunnan Agricultural University:Natural Science
基金
云南省教育厅重大专项(ZD2015006)
关键词
干旱胁迫
冬播马铃薯
现蕾期
叶绿素荧光参数
drought stress
winter sowing potatoes
squaring stage
chlorophyll fluorescence parameter
