%0 Journal Article
%T Effects of NaCl stress on cation contents in different pumpkin cultivars'''' seedlings<br>氯化钠胁迫对不同品种南瓜幼苗阳离子含量的影响
%A LI Wei-xin
%A CHEN Gui-lin
%A REN Liang-yu
%A WANG Peng
%A <br>李卫欣
%J 应用生态学报
%D 2008
%I 
%X With the seedlings of 19 pumpkin cultivars as test materials, this paper studied the variations of Na+, K+, Ca2+, Na+/K+, Na+/Ca2+, SN+, K+ and SNa+, ca2+ in their shoots and roots under the stress of 300 mmol NaCl x L(-1). The results showed that after an 8-day exposure to 300 mmol NaCl x L(-1), the Na+ content in the seedlings increased significantly while the K+ content decreased, resulting in the brokenness of ion balance. The root Na+ content, shoot Na+/K+ and Na+/Ca2+ ratios, and SNa+, K+ and SNa+, Ca2+ of Cucurbita moschata (Q1) were significantly higher than those of C. maxima (H2) and C. ficifolia (H3). The variation tendency of these parameters of different pumpkin cultivars' seedlings were nearly consistent with the salt injury index of the seedlings under NaCl stress, which further proved that the strong salt-tolerance of Q1 was related to the lower values of shoot Na+/K+, Na+/Ca2+, SNa+, K+ and SNa+, Ca2+, and the high contents of K+ and Ca2+, while the salt-sensitivity of H2 and H3 was related to the higher values of shoot Na+/K+, Na+/Ca2+, SNa+, K+ and SNa+, Ca2+, and low contents of K+ and Ca2+ under NaCl stress.
%K NaCl胁迫
%K 南瓜
%K 离子
%K Na
%K /K
%K Na
%K /Ca2
%K 氯化钠胁迫
%K 品种
%K 黑籽南瓜
%K 幼苗根系
%K 离子含量
%K 影响
%K cultivars
%K pumpkin
%K different
%K contents
%K cation
%K NaCl
%K stress
%K Effects
%K 盐敏感
%K 耐盐性
%K 验证
%K 盐害指数
%K 变化趋势
%K 黑蜜
%K 离子平衡
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=8B5CF80DB7E3DF70E4C4935D2CE1A15E&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=1FA4E9C3E6E88FC8&eid=F6467E7C54ED952D&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=22