摘要
选用高水肥型玉米品种，以ＰＥＧ胁迫水培法控制不同的水分变化，用Ｈｏａｇｌａｎｄ全营养液和无磷营养液控制磷水平，测定了三叶期以后的玉米叶片中可溶性糖、蔗糖、游离氨基酸总量及脯氨酸含量的变化。结果表明，干旱胁迫下磷对４种有机渗调物质的积累量和引起急剧变化的时间有着显著的影响；通过多次干湿间歇变水处理，有磷处理表现出较强的恢复能力，对再度干旱胁迫也具有较好的适应性；缺磷干旱时，可引起蔗糖含量的大量累积；游离脯氨酸在严重干旱时的变化更为敏感。
With PEG water stress cultivation to control water variations andHoagland whole nutrient solution and P-free solution to control phophate levels,hish-water and fertilizer requirement type of corn variety was selected to determine total ofsoluble sugar,sucrose,free amino acid and the variations in proline contents.The resultsshowed that P had the obvious effbct upon the accumulation of organic osmotic and reg-ulating substances and time causing the extreme variation under the drought stress.Through many dry and wet intermittent varying water treatments,the treatment with Pshowed strong recovering ability and also the better adptability in the case of drought re-stress. In the drought conditions with lack of P,sucrose accumulation can be caused inlarge bulk while free-proline showed more sensitive to variations in case of severedrought.
出处
《干旱地区农业研究》
CSCD
北大核心
1996年第2期72-77,共6页
Agricultural Research in the Arid Areas
关键词
渗透胁迫
磷
渗调物质
玉米
osmotic stress
P nutrient
osmotic and regulating substance
