白杨染色体加倍技术研究及三倍体育种（Ⅳ）──加倍体白杨生理特性的初步研究

该文对加倍体白杨（ＴＢＴ－７）和二倍体白杨（ＴＢＤ）以及其父本（ＴＢ１１）、母本（ＴＢ０１）、欧洲山杨三倍体等植株的生理特性进行了比较研究，结果表明：白杨加倍体植株的叶组织有机物相对含量明显高于其它株系，如：蛋白质相对含量比二倍体对照株（ＴＢＤ）提高３５．７％，比父本（ＴＢ１１）提高８２．５％，ＤＮＡ相对含量比ＴＢＤ提高３％，比ＴＢ１１提高４１．８％，叶绿素相对含量比ＴＢＤ提高１５．６％，比ＴＢ１１提高３２．９％。叶片经干旱、低温、冰冻、高温处理之后，ＴＢＴ－７的原生质膜渗透率均明显低于其它系号。初步证明ＴＢＴ－７是具有速生的生理基础和潜势、叶组织具有较好抗逆性的加倍体白杨。

Studies on Chromosome Doubling Triploid Breedingof White Poplar──A Preliminary Study on Physiological Characteristicsof Polyploid White Poplar ( Ⅲ )

Comparative studies on the physiological characteristics of polyploid whitepoplar (TB'T-7) , diploid white poplar TBD (control) and TB11 ♂. TB01 ♀ (parents) . triploidAstria. were carried out. Results showed that the amount of organic substance in leaves ofpolyploid white poplar was far higher than that of others. For example, the amount of pro-tein, DNA , and chlorophyll was higher than that of TBD by 35. 7% , 3% and 15. 6% respec-tively. Treated with the conditions of drought , low temperatures, freezing and high tempera-tures, the protoplasm membrane permeability of polyploid white poplar leaves was obviouslylower than that of others. It was preliminarily proved that the TBT-7 had the physiologicalbase and latent tendency of a great growth rate; it was also a polyploid tree with strong resis-tance.