野生花卉中华野海棠的抗逆性研究

研究了干旱胁迫、高温胁迫、低温胁迫以及不同遮荫条件对中华野海棠POD活性、SOD活性、可溶性蛋白含量、叶绿素含量等几个生理指标的影响。结果表明:随着土壤含水量的下降,中华野海棠的净光合速率有一定程度的降低,但叶绿素含量有所上升;在高温胁迫下,随着处理温度的上升,中华野海棠的POD活性、SOD活性以及可溶性蛋白的含量均呈现先上升后下降的趋势,只是上升及下降的幅度有所不同;在低温胁迫下,随着处理温度的下降,中华野海棠的POD活性及SOD活性也呈现先上升后逐渐下降的趋势;在遮荫处理下,中华野海棠的叶绿素含量随遮光率的上升而上升,并且光饱和点和光补偿点均较低。说明中华野海棠抗旱性不强,但耐荫性好,且具有一定的耐寒性和耐热性。

Study on Stress Resistance of Wild Flower Bredia sinensis

Impact of drought stress,high temperature stress,low temperature stress and diverse intensities of shade on activity of POD,SOD,content of soluble protein,chlorophyll,etc.of Bredia sinensis was studied.The results showed that net photosynthesis rate falled to a certain extent,but content of chlorophyll somewhat increased,as soil moisture decreased;activity of POD,SOD,content of soluble protein of Bredia sinensis showed a trend of first rising and then falling,only extent of rising or falling was different,as temperature increased under high temperature stress;activity of POD,SOD of Bredia sinensiss also showed a trend of first rising and then falling,as temperature falled under the low temperature stress;content of chlorophyll of Bredia sinensis rised and the light saturation point(LSP) and the light compensation point(LCP) were low,as shading rate increased.It showed the drought resistant of Bredia sinensis was not strong,but shade tolerance was strong,and cold and heat tolerance was a certain extent strong.