【摘要】 NaCl胁迫下研究了三个不同耐盐水平(不耐盐、稍耐盐、较耐盐)的棉花材料的蕾、花、铃脱落及其规律。低浓度NaCl(0.20%)仅对耐盐性差的材料的脱落率的有显著影响,不耐盐材料的脱落率的次序是蕾>花>幼铃>大铃,对稍耐盐材料的蕾、花也存在显著影响。在高浓度NaCl(0.40%)下,脱落率取决于材料的耐盐性,其脱落率次序是:不耐盐材料>稍耐盐材料>较耐盐材料,耐盐性与脱落率呈负相关,耐盐性高的材料其脱落率较低。不同耐盐性能的材料的蕾、花、铃脱落率存在显著差异;不耐盐材料的脱落率依次为:蕾=花>幼铃>大铃;较耐盐材料的脱落率依次为:蕾>花=幼铃>大铃;较耐盐材料的脱落率依次为:蕾>幼铃>花,在NaCl(0.40%)以下的浓度都不会对较耐盐材料的大铃产生影响。更多还原

【Abstract】 The abscission of the buds,flowers,and bolls of upland cotton was studied under the stress of NaCl by using the three different salt-tolerant types such as salt sensitive(SS)type,salt-low-tolerant(SLT)type,and salt-high-tolerant(SHT)type.NaCl decreased the cotton setting of buds,flowers and bolls.At the lower concentration(0.2% NaCl),NaCl increased the abscission of the SS type and the SLT type.The order of the abscission at the lower concentration is,bud>flower>littlle boll>big boll.NaCl greatly affected abscission,the order of materials is: SS>SLT>SHT.And the abscission was inverse to the salinity-resistance ability.The orders of abscission among materials were different.The abscission orders of the salinity-sensitive materials are,bud=flower>small boll>big boll;and the abscission order of SLT,bud>flower=small boll>big boll;and the abscission order of the SHT is,bud>small boll>flower>big boll,and big boll was affected little under treatment of high NaCl.更多还原