豫烟新品种生理特性的研究

Study of physiological characteristics in Yuyan new varieties

以河南省自育烤烟新品种豫烟6号、豫烟7号和豫烟10号为研究对象,比较分析其在自然条件下,生长发育关键时期(伸根期、旺长前期和旺长后期)土壤含水量、根系形态、根系活力、叶片脯氨酸含量和超氧化物歧化酶活性等生理特性的差异。结果表明,旺长后期,3个豫烟新品种的根系形态差异最大,其中豫烟7号的总根长、根表面积和根体积最大,豫烟6号次之,豫烟10号最小;旺长后期的根系活力和土壤含水量最低时的叶片脯氨酸含量及各时期叶片超氧化物歧化酶活性的大小顺序均为豫烟7号>豫烟6号>豫烟10号。在河南省烟区,豫烟7号的环境适应能力较强,豫烟6号次之,豫烟10号较差。

Using Henan province self-bred Yuyan new varieties Yuyan 6,Yuyan 7 and Yuyan 10 as research subjects,the soil moisture,root morphology and activity,leaf proline and superoxide dismutase(SOD)activity in three critical periods of growth and development(root-extended period,early and late vigorous growth periods)were determined and compared among the three Yuyan new varieties under natural conditions.The results showed that:compared with other sampling periods,in the late vigorous growth stage,the root morphology among the three Yuyan new varieties differed most,the root length,surface and volume of Yuyan 7,Yuyan 6 and Yuyan 10 were in a significantly descending order.The root activity in late vigorous growth stage,leaf proline content when the soil moisture is the lowest and leaf superoxide dismutase in all the three critical periods were all following the pecking order of Yuyan 7>Yuyan 6>Yuyan 10.Therefore,in Henan province tobacco growing areas,the environmental adaptation ability of Yuyan 7 is stronger,which is followed by Yuyan 6,Yuyan 10 has the worst environmental adaptability.