摘要
为明确‘张杂谷3号’的抗旱高产机理,本试验以杂交谷子品种‘张杂谷3号’和常规谷子品种‘大同29’为试验材料,在人工控制遮雨棚的旱池栽培条件下,于谷子拔节期进行干旱胁迫后复水处理试验,测定了2个谷子叶片的光合指标、叶绿素荧光参数(初始荧光(Fo)、最大荧光(Fm)、PSII原初光能转化效率(Fv/Fm)、光化学猝灭系数(qP))、以及产量。结果表明:随着干旱胁迫天数的增加,‘张杂谷3号’和‘大同29’的Pn、Fv/Fm、Fv′/Fm′、qP、ФPSII均有下降趋势,但与‘大同29’相比,‘张杂谷3号’下降的百分率少:在干旱胁迫后21d,‘张杂谷3号’的Pn、Fv/Fm、Fv′/Fm′、ФPSII、qP分别下降5.83%,0.98%,9.48%,9.70%和14.76%,‘大同29’分别下降29.06%,3.05%、21.08%、15.35%和13.81%。复水后‘张杂谷3号’和‘大同29’的光合速率均有一定恢复,但‘张杂谷3号’明显的优于‘大同29’,在复水后21d,‘张杂谷3号’除ФPSII外,其它荧光参数分别恢复至比对照(正常供水)低0%,0.24%,0.74%,7.37%,-1.92%(高于对照水平);‘大同29’分别恢复至比对照低27.98%,2.81%,8.71%,12.65和6.20%。‘张杂谷3号’的产量比对照降低了18.61%,‘大同29’比对照降低了58.58%,表明‘张杂谷3号’较常规谷子有较强的抗旱性。
To study the drought-resistant and high-yield mechanism of hybrid millet,the influence of drought stress and rewatering on the photosynthetic characteristics and yield of hybrid millet were studied in this trial.The results indicated that：the photosynthetic parameters Pn,Fv/Fm,Fv′/Fm′,ФPSII and qP of‘Zhangzagu 3＇decreased less than ‘Datong 29＇within 21 days of drought stress and restored more than‘Datong 29＇after rewatering 7ds,14 ds and 21 ds respectively.The Pn,Fv/Fm,Fv′/Fm′,ФPSII and qP of‘Zhangzagu 3＇declined 5.83%,0.98%,9.48%,9.70%and 14.76%respectively than control after 21 days of drought stress;While the Pn,Fv/Fm,Fv′/Fm′,ФPSII and qP of ‘Datong 29＇declined29.06%,3.05%,21.08%,15.35%and 13.81%respectively after 21 days of drought stress.After rewatering for 21 ds,the Pn,Fv/Fm,Fv′/Fm′,ФPSII and qPof‘Zhangzagu 3＇restored to 0%,0.24%,0.74%,7.37% and-1.92%less than control respectively;the Pn,Fv/Fm,Fv′/Fm′,ФPSII and qP of ‘Datong29＇can only restored to 27.98%,2.81%,8.71%,12.65 and 6.20% less than control.After harvesting,‘Zhangzagu 3＇has larger spike mass,higher 1,000-grain mass and yield than‘Datong 29＇after 21 ds drought stress in jointing stage.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2017年第4期19-24,共6页
Journal of Hebei Agricultural University
基金
国家科技支撑计划项目(2011BAD06B01)
张家口市科技攻关项目(1112012C-2)
关键词
干旱胁迫
复水
张杂谷
光合作用
产量
Setariaitalica（L.）Beauv
drought stress
rewatering
＇Zhangzagu＇
yield
photosynthesis
