摘要
本文利用P─V技术,对从湘、黔、川、陕四省选出的18个杜仲无性系优树进行了水分生理状况测定,结果表明:在充分吸胀时和膨压为零时具有较低渗透势的耐旱品系依次为湘11号、黔9号、黔1号、略41号、略27号、略33号、黔8号、略16号、湘18号、略49号、略7号、略14号、灌3号、湘3号、灌2号、黔11号、略1号、灌1号;依据膨压(PVAT)、细胞弹性模量(ε)和细胞体积比(RCV)的相互关系,将18个杜仲优树分成两大类型:具有较大PVAT、ε值和较小RCV值的为一类,具有较小PVAT、ε值和较大RCV值的为另一类,显示了它们在抗旱机制中的差异性。
Physiological characteristics of the water in 18 excellent eucommia clones selected from Hunan,Guizhou,Sichuan and Shaanxi provinces were measured by adopting P-V technique.Results have shown that for the clones which possess a lower osmotic potential under the conditions of a saturated imbibition and a zero dilation pressure are drought-resistant varieties.A sequence among 18 clones is put in order on the basis of their drought resistance.They are divi ded into two types according to the relationship among dilation pressure,cell modulus of elasticity andcell volume ratio.
出处
《西北林学院学报》
CSCD
1994年第4期12-16,共5页
Journal of Northwest Forestry University
基金
中国科学院"八五"重点攻关课题
关键词
杜仲
水分生理
苗木
Eucommia ulmoides,P-V curve technique,water physiology,plasmolysis,osmoticregulation