中苜一号紫花苜蓿耐盐性研究

Research of Salt Tolerance in Alfalfa

在NaCl盐溶液及其与外源ABA的互作下,对中苜一号紫花苜蓿种子萌发、幼苗生长及细胞膜透性的影响进行了研究。结果表明,低浓度(小于0.3%)NaCl盐溶液对中苜一号紫花苜蓿种子萌发、幼根生长具有促进作用。50mmol/L的NaCl盐溶液在0～20d对株高、地上生物量均具有一定的促进作用,大于50mmol/L则使株高生长和地上生物量的积累减弱。NaCl盐处理下膜透性增大。外施ABA可减弱NaCl盐对株高、地上生物量的抑制作用、对膜透性的增加效应。相比较,10×10-2mmol/LABA较5×10-2mmol/LABA功效更明显。

The effects of NaCl solution and the interaction with ABA on the seed germination, seedling growth and cell membrane permeability of alfalfa were studied. The results showed that low concentration of NaCl solution（under 0.3 percent）Promoted the seed germination, root growth of Radicle. 50 mmol/L NaCl solution was beneficial to plant height, aboveground biomass before twenty days, but more than 50 mmol/L could reduced the plant height growth and the accumulation of aboveground biomass. The cell membrane permeability increased under the NaCl solution. The effect on inhibiting the height and aboveground biomass and increasing the cell membrane permeability were all Weaken with ABA. the function of 10 × 10^-2 mmol/L ABA was more obvious than that of the 5 ×10^-2 mmol/L.