摘要
以A060233×D123-42(T,耐盐性较强)和D168-83×A06148(S,耐盐性较弱)两个玉米杂交组合为实验材料,利用80 mmol·L^(-1)NaC1溶液对种子进行引发处理。采用营养液砂培实验,设4个NaC1浓度(0、120、200和250 mmol·L^(-1))模拟盐胁迫,研究种子引发处理对NaC1胁迫下玉米种子萌发及幼苗生长的影响。结果表明:随着NaC1浓度的增加,无论经引发处理,还是未经引发处理,两个玉米杂交组合的出苗率均下降,幼苗生长均受到抑制,干物质积累量均减少。同等NaC1浓度胁迫下,引发处理与未引发处理相比,种子出苗率增加,促进了苗高和根的生长,叶面积、苗干重、根干重和耐盐指数增加,叶绿素和脯氨酸含量升高,地上部和地下部的K^+/Na^+值增加。
Seeds of two maize （Zea mays L.） hybrid combinations of A060233 XD123-42 （T, a high salt-tolerent cross combinatioh） and D 168-83×A06148 （ S, a salt-susceptible cross combination） were primed with 80 mmol·L^-1 NaCl. The primed seeds were subjected to salt stress of 4 NaCl concentrations （0. 120. 200 and 250 mmol·L^-1 ） in a sand culture experiment. The effects of the seed priming and NaCl stress on seed germination and seedling growth under salt stress were investigated. The results show that with or without priming, seed emergence rate declined. The growth of seedling was inhibited while the accumulation of dry weight reduced. Compared with unpfimed seeds under the same NaCI concentration, primed seeds had higher emergence rate, higher height of seedlings and length of roots, higher leaf areas, higher dry weight of seedlings and dry weight of roots, higher salt resistance index, higher contents of chlorophyll and proline, higher ratio ofK^＋/Na^＋in shoots and roots of seedlings.
出处
《天津农学院学报》
CAS
2012年第1期1-6,共6页
Journal of Tianjin Agricultural University
基金
天津市科技攻关项目"饲用高油玉米相关性状的遗传研究及新品种选育"(06YFGZNC01200)
