Wheat Resisting Mechanism Of Na ~ +,

W (M H L.) is a Na+exclusiontw glycophyte. In misexperirnenL a taltsensitive cLiltivar Ou No. l5: Lu l5) and a salttOleIan culhvdi'(Dekan No. 96l: Dk 96l) were used tO comPare their characteriedcs of Na+exclusion and tO examin Na exc1usho IneCbosm of the hotObo whetPtebo The Inain ed were as follows:l Effed of NaCl beAnent on wheat ~hfor length. edg neght bo wctgh of roo anct bot anu for weightof roo and shoot of the tWo cM all be Under NaCl bo bllt ailthe growth tw of Dk 961 M less than thOse of Lu 15. TO the saxnecuIhvar the dribihon of NaCl thet on edg heigh was more than that otroo length. The beh weigh and tw weigh of Dk 961 shoot were constantl}'bigger than those of the roO.Z Effed of Nacl behoent on cen membrane Permeabwe of whed metand leafCell membfan permAfty of root and 1eafofthe two culhvars ha1Under NaC1 treattnnt and cell membnme ~ility of Lu l5 dri moreilwn that of Dk 96l. TO the sarne cLilhvar ce1l membfan penneability of leaf wasless altered by NaCl thet than that of root.3 EffeCt of NaO beAnent on Na+and K+contCnt of wheat met and shootUnder an inrment of NaCl concentalon and NaC1 shock boL Na+content in root and shoot of the tWo cultivars all increwt and Na+ content of rootwas obviously higher than that of shoo. Shoot Na* contCnt of Dk 96l wassignifiCantiy lowe than tha of Lu l5. Root and shoot K* content of the tw)culhvars all decIeased. and K+content of shoot was higher than tha of met. Slrot 硕士毕业论文:小麦�'刃awt理的研究K+ conteni of Lu l5 decnd mere than that of Dk 96l. Root and shoot K+coun of Dk 96l were all higher than those of Lu 15. Roo and shoot K*/ Na+ofthe tWo cultivare all decwt and Lu 15 bo mere than Dk %l. Root anlshoo K+/ Na+ofDk %l were all higher than those of Lu l5.4 Ebo of NaCl wtent on \, We to~ and \ As (~) of wheatM an inCIeIntal of NaCl COnCentIation and NaCl shock bont S., N,l