WANG Fa-wei,Lu Jing,TIAN Xiao-hong,et al.Effect of Ethylene on Physiological and Biochemical Indexes of Soybean Seedlings under Low Phosphorus[J].Soybean Science,2011,30(06):936-940.[doi:10.11861/j.issn.1000-9841.2011.06.0936]
低磷胁迫下乙烯对大豆幼苗生理生化指标的影响
- Title:
- Effect of Ethylene on Physiological and Biochemical Indexes of Soybean Seedlings under Low Phosphorus
- 文章编号:
- 1000-9841（2011）06-0936-05
- Keywords:
- Soybean; Phosphate stress; Ethylene content; Physiological indicators
- 分类号:
- S643.7；Q945.78
- 文献标志码:
- A
- 摘要:
- 为研究低磷胁迫下施用乙烯（50 ?? mol·L-1）对大豆(中黄22)幼苗的影响，将培育至幼苗期的大豆分别置于高磷、高磷+乙烯、低磷、低磷+乙烯4组营养液中。利用水培法培养大豆15 d后，对大豆的光合速率、蒸腾速率、乙烯释放量、磷含量、根系活力等生理生化指标进行测定。结果表明：对低磷胁迫下的大豆植株施加乙烯后，植株根系乙烯释放量大幅增加，植株根中磷含量相对升高，同时大豆根系活力升高，根体积增加，说明乙烯具有促进大豆根系对磷的吸收的作用；但是乙烯的加入降低了硝酸还原酶活性、光合速率和蒸腾速率，因而最终导致大豆植株生物量的降低。
- Abstract:
- In order to analyze the effects of ethylene(50 μmol·L-1)on physiological and biochemical of soybean seedlings under low phosphorus，pot experiments were conducted in 2010，with soybean cultivar Zhonghuang 22 as material.Soybean seedlings were transplanted into Hoagland solutions when the first true leaves were expanded.Four treatments including HP(2 mmol·L-1 Pi)，LP(20 μmol·L-1 Pi)，HP+Eth and LP+Eth were set.After cultivation for 15 days，soybean seedlings were sampled and the physio-biochemical characters of soybean were determined，such as photosynthetic rate，transpiration rate，ethylene release quantity，phosphorus content，root activity，etc.The results showed that ethylene affected physiological and biochemical traits of soybean.Under low phosphorus stress，plant roots ethylene production and phosphorus content increased obviously after adding ethylene.At the same time，ethylene promoted the growth of main root，root volume and root vigor.It showed ethylene could enhance the phosphorus absorbing ability by promoting root morphology and activity.For photosynthesis，transpiration and nitrate reductase activity，however，ethylene had inhibitory effect，which led to the decrease of dry matter accumulation and water absorption.
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备注/Memo
第一作者简介：王法威(1988-),男,在读硕士,研究方向为植物营养生理。E-mail：wfw_014@163.com。