作物学报 ›› 2016, Vol. 42 ›› Issue (11): 1700-1707.doi: 10.3724/SP.J.1006.2016.01700
徐文1,2,申浩1,2,郭军2,余晓丛2,李祥1,杨彦会1,马晓1,赵世杰1,*,宋健民2,*
XU Wen 1,2,SHEN Hao1,2,GUO Jun2,YU Xiao-Cong2,LI Xiang1,YANG Yan-Hui1,MA Xiao1,ZHAO Shi-Jie1,*,SONG Jian-Min2,*
摘要:
于2013—2014和2014—2015年度,以多蜡质和少蜡质的4个小麦近等基因系为材料,采用田间旱棚方式控制土壤水分,研究了蜡质含量与小麦抗旱性的关系。结果表明,干旱处理后,多蜡质小麦品系旗叶的蜡质含量平均为15.15 mg g?1,较少蜡质小麦品系(8.43 mg g?1)高79.8%;多蜡质小麦品系旗叶的水势较高,干旱处理后下降幅度明显小于少蜡质小麦品系,水分散失率也显著低于少蜡质品系(P< 0.05);多蜡质小麦品系旗叶的光合速率平均下降7.5%,而少蜡质小麦品系下降9.8%;多蜡质小麦品系旗叶PSII最大光化学效率(Fv/Fm)平均下降幅度为3.4%,少蜡质小麦品系下降幅度达到5.8%;多蜡质小麦品系的籽粒产量高于少蜡质品系,平均高3.7%;多蜡质小麦品系的抗旱指数和干旱敏感指数均显著低于少蜡质小麦品系(P< 0.05)。以上结果表明,蜡质能够提高小麦的抗旱性,旗叶蜡质含量可以作为抗旱小麦品种的选择指标。
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