NaCl胁迫对番茄嫁接苗生物量及离子含量的影响

以影武者为砧木,宝大903为接穗,研究了NaCl胁迫下番茄嫁接苗与接穗自根苗在生物量及Na 、K 、Ca2 、Mg2 、Cl-等含量方面的差异.结果显示,NaCl胁迫下,嫁接苗生长受抑制程度较轻;嫁接苗和自根苗Na 、Cl-含量增长幅度最大的部位均是叶片,嫁接苗增长幅度小于自根苗;K 、Ca2 、Mg2 含量下降幅度最大的部位均是根系,嫁接苗下降幅度小于自根苗;嫁接苗的K /Na 值、Ca2 /Na 值显著高于自根苗,说明嫁接苗选择性吸收K 、Ca2 能力显著强于自根苗.结果表明,NaCl胁迫下嫁接苗体内离子分布的区域化优于自根苗,耐盐性强于自根苗.

Effects of NaCl Stress on the Biomass and Ion Contents in Grafted Tomato Seedlings

Using 'Kagemusya'(Lycopersicon esculentum Mill.) as the root stock and 'Baoda 903' as the scion the study investigated biomass,Na~ ,K~ ,Ca~(2 ),Mg~(2 ) and Cl~-differences between grafted seedlings and own-root seedlings of tomato under NaCl stress.It showed that under NaCl stress,the grafted seedlings got lightly inhibited,both the grafted seedlings and the scion seedlings presented the highest Na~ and Cl~-increments in their leaves and the Na~ and Cl~-increments in the grafted seedling were lower than those in the own-root seedlings;the highest K~ ,Ca~(2 ),Mg~(2 ) decrements all occurred in the roots and the decrements in the grafted seedlings were lower than those in the own-root seedlings;the K~ /Na~ and Ca~(2 )/Na~ ratios in the grafted seedlings were significantly higher than those in the own-root seedlings,which indicated that the grafted seedlings had significantly higher capacities of K~ and Ca~(2 ) selective absorptions than the own-root seedlings.All these proved that under NaCl stress the grafted seedlings had better ion compartmentalization and stronger salt tolerance than the own-root seedlings did.