摘要
稀土延缓杨树花粉和种子衰老的研究杨敏生，康明，刘艳枝（河北林学院保定０７１０００）关键词银毛杨，新疆杨，花粉，种子，酶活性，稀土元素．林业上应用稀士（ｒａｒｅｅａｒｔｈ；ＲＥ）元素以来，发现其具有促进苗木生长［１］，提高种子发芽率［２］，促进插条生根...
In the experiments with hybridization between Populus alba × P.tomentosa and p. alba var. pyramidalis,the branches with male flowers were treated with rare earth element solutions at concentrations of 10,50 and 200ppm.The results showed that rare earth treatments increased the germination percentage of fresh pollens and delayed their vitality decline.And rare earth treatment at 200ppm was observed to have the best effects.The female flower oranches were also treated with rare earth solutions at 5,80,200 and 500ppm.The viability of seeds could be maitained for a long time after the treatments.These experiments proved that rare earth treatments could keep the cell membranes intact and slowed down the leakage of metabolities.t was found that the amount of oxygen absorbed by seeds and the vitality of dehydrogenase were inhanced,and the transportation rate of stored substances was speeded up.
出处
《林业科学》
CAS
CSCD
北大核心
1994年第2期166-169,共4页
Scientia Silvae Sinicae
关键词
花粉
种子
酶活性
稀土
杨树
衰老
P.alba × P.tomentosa,P.alba var. pyramidalis,Pollen,Seed,Activity of enzyme,Element of rare earth
