|本期目录/Table of Contents|

[1]明凤,娄玉霞,梁斌,等.低磷胁迫下不同水稻品种根系吸收能力差异的生理与遗传本质[J].应用与环境生物学报,2002,8(05):473-477.
 MING Feng,et al..Genetic and physiological mechanism of Puptake ability difference between different rice (Oryza sativa L.) genotypes under lowP stress[J].Chinese Journal of Applied & Environmental Biology,2002,8(05):473-477.
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低磷胁迫下不同水稻品种根系吸收能力差异的生理与遗传本质()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
8卷
期数:
2002年05期
页码:
473-477
栏目:
综述
出版日期:
2002-10-25

文章信息/Info

Title:
Genetic and physiological mechanism of Puptake ability difference between different rice (Oryza sativa L.) genotypes under lowP stress
作者:
明凤娄玉霞梁斌沈大棱叶鸣明朱立煌
Author(s):
MING Fenget al.
(Institute of Genetics, Fudan University, Shanghai200433, China) (1Biotechnology Lab, Shanghai Teachers University, Shanghai201418, China) (2Institute of Genetics, Chinese Academy of Sciences, Beijing100101, China)
关键词:
关键词 水稻低磷胁迫磷吸收磷酸盐转运蛋白竞争
Keywords:
Keywords rice (Oryza Sativa L.) low phosphorus stress phosphorus uptake high affinity phosphate transporter competition
摘要:
摘要 在低磷(1 mg L-1)和适磷水平( 10 mg L-1)下,分别以混合培养方式研究了粳稻京系17 (Oryza sativa ssp.japonica) (JX17)和 籼稻窄叶青8号 (Oryza sativa ssp. indica) (ZYQ8)对磷营养的反应.结果表明,低磷胁迫下, JX17较ZYQ8吸收更多磷素,干物重也显著增加.相反,ZYQ8则受到更强的磷胁迫,吸磷量和干物重降低.主要是因为JX17具有较高的吸磷速度,单位根长吸磷量大,即根系高亲和力磷酸盐转运蛋白表达强,最大限度地吸收可能利用的磷素,从而改善植株营养状况,同时又有较多的磷被分配到根系,使根长、根表面积和根干重相应提高,进一步增加了其在低磷胁迫条件下的竞争磷营养的优势.图3 表2 参17
Abstract:
Abstract Under low (1 mg L-1) and sufficient (10 mg L-1) phosphorus (P) levels, response to P stress by two rice genotypes, JX17 (Oryza sativa ssp. japonica) and ZYQ8 (Oryza sativa ssp. indica), was studied by mixed culture method. The results showed that JX17 absorbed more P and had higher biomass under Pstress. On the contrary, ZYQ8 suffered from P stress to a large extent with lower Puptake and biomass. JX17 had higher Puptake rate expressed as P amount per root length. The main reason was that JX17 possessed higher express of high affinity phosphate transporter, which played an important role in Puptake. With the improvement of P status in plant, P llocation to root increased so well in JX17 that enhanced its root length and root surface area, which, in return, contributed to a greater advantage in Puptake under P stress. Fig 3, Tab 2, Ref 17

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更新日期/Last Update: 2002-10-28