期刊论文

中文

亚热带植物科学

1009-7791

2016

45

1

27-31

10.3969/j.issn.1009-7791.2016.01.006

长沙市科技计划项目（K1406011-21） 湖南省自然科学基金（2015JJ3178）

本校为第一机构

以红杆铁皮石斛Dendrobium officinale为材料,研究植物生长调节剂6-苄氨基腺嘌呤（6-BA）和赤霉素（GA3）对其幼苗在Na Cl胁迫下的生理生化影响。结果表明,盐胁迫下,低浓度6-BA和GA3处理均可不同程度地提高红杆铁皮石斛幼苗的茎生长率,抑制根的伸长,且GA3抑制效果大于6-BA;随着6-BA浓度增加,盐胁迫下红杆铁皮石斛叶片叶绿素含量降低,类胡萝卜素含量则呈先升后降的趋势,而较高浓度GA3（4.0 mg·L-1）处理同时提高叶绿素和类胡萝卜素含量;低浓度6-BA（2.0 mg·L-1）处理能提高红杆铁皮石斛叶片可溶性糖含量,相同浓度GA3处理则降低可溶性糖含量,但高浓度GA3处理的可溶性糖含量与对照无显著差异。因...

Physiological and biochemical influences of plant growth regulators（6-BA and GA3） on red-stem Dendrobium officinale seedlings under salt stress were performed. The results showed that low concentration of 6-BA and GA3 remarkably increased stem growth rate of red-stem D. officinale under salt stress, but reduced root growth rate. And GA3 had more effects than 6-BA in root growth rate. With the increase of 6-BA concentration, the chlorophyll contents in leaves of red-stem D. officinale displayed a high-low trend, and the carotenoid contents dis...