Plant growth and phosphorus accumulation of wild type and two root hair mutants of Arabidopsis thaliana (Brassicaceae)
Plant growth and phosphorus accumulation of wild type and two root hair mutants of Arabidopsis thaliana (Brassicaceae)
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DOI：
10.2307/2656994
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发表时间：
2000-07-01
影响因子：
3
通讯作者：
Lynch, JP
中科院分区：
文献类型：
--
作者：
Bates, TR;Lynch, JP
拟南芥根毛生长更长，更密集的响应低磷供应。我们测试的假设，野生型拟南芥将获得更多的磷在磷限制条件下比突变体，没有根毛反应。在0.4 ~ 54 mmol/m3磷浓度范围内，比较了野生型拟南芥（WS）、两种根毛突变体（rhd 6和rhd 2）在8个磷处理下的生长和磷吸收情况。低磷处理。所有植物都很小，并表现出严重的磷胁迫症状。在1.5 mmol/m3磷水平下，WS植株的地上部生物量、绝对生长速率、全磷和比磷吸收量均高于两个根毛突变体。在最高磷处理，有没有基因型之间的任何参数测量的差异。我们的结论是，响应增加根毛生长在低磷可用性在拟南芥中是重要的，在磷限制条件下增加磷的收购。
Arabidopsis thaliana root hairs grow longer and denser in response to low-phosphorus availability. We tested the hypothesis that wild-type Arabidopsis would acquire more phosphorus under phosphorus-limiting conditions than mutants that do not have the root hair response. The growth and phosphorus acquisition of wild-type Arabidopsis (WS) were compared to two root hair mutants (rhd6 and rhd2) under eight phosphorus treatments ranging from 0.4 mmol/m(3) to 54 mmol/m(3) phosphorus. At the lowest phosphorus treatment. all plants were small and showed severe phosphorus stress symptoms. At 1.5 mmol/m(3) phosphorus, WS plants had greater shoot biomass, absolute growth rate, total phosphorus, and specific phosphorus absorption than the two root hair mutants. At the highest phosphorus treatment, there was no difference between genotypes in any of the parameters measured. We conclude that the response of increased root hair growth under low phosphorus availability in Arabidopsis is important in increasing phosphorus acquisition under phosphorus-limiting conditions.