Rice auxin influx carrier OsAUX1 facilitates root hair elongation in response to low external phosphate.
Rice auxin influx carrier OsAUX1 facilitates root hair elongation in response to low external phosphate.
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DOI：
10.1038/s41467-018-03850-4
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发表时间：
2018-04-12
影响因子：
16.6
通讯作者：
Bennett MJ
中科院分区：
文献类型：
--
作者：
Giri J;Bhosale R;Huang G;Pandey BK;Parker H;Zappala S;Yang J;Dievart A;Bureau C;Ljung K;Price A;Rose T;Larrieu A;Mairhofer S;Sturrock CJ;White P;Dupuy L;Hawkesford M;Perin C;Liang W;Peret B;Hodgman CT;Lynch J;Wissuwa M;Zhang D;Pridmore T;Mooney SJ;Guiderdoni E;Swarup R;Bennett MJ
根部特征，如根角和毛长，影响资源的获取，特别是磷(P)等固定养分的获取。在这里，我们试图通过干扰OsAUX1生长素内流转运蛋白基因来改变水稻的根角，以努力提高水稻对磷的获取效率。我们通过X射线显微CT成像表明，osaux 1突变体的根角发生了变化，导致了在正常积累磷的表层土壤中优先觅食，但令人惊讶的是，磷的获取效率并没有提高。通过更深入的研究，我们发现OsAUX1也促进了根毛的伸长，以响应磷的限制。记者的研究表明，在低磷环境中，根毛区的生长素反应增加。我们证明了OsAUX1的功能是将生长素从根尖调动到分化区，在那里当根遇到低的外部磷时，这个信号促进了毛发的伸长。我们得出结论，生长素和OsAUX1在促进水稻根对磷的觅食方面起着关键作用。植物根构型能适应土壤中不同的营养条件。在这里，Giri等人。结果表明，水稻生长素内流载体AUX1将生长素从根尖动员到分化区，并在根遇到低外源磷时促进根毛伸长。
Root traits such as root angle and hair length influence resource acquisition particularly for immobile nutrients like phosphorus (P). Here, we attempted to modify root angle in rice by disrupting the OsAUX1 auxin influx transporter gene in an effort to improve rice P acquisition efficiency. We show by X-ray microCT imaging that root angle is altered in the osaux1 mutant, causing preferential foraging in the top soil where P normally accumulates, yet surprisingly, P acquisition efficiency does not improve. Through closer investigation, we reveal that OsAUX1 also promotes root hair elongation in response to P limitation. Reporter studies reveal that auxin response increases in the root hair zone in low P environments. We demonstrate that OsAUX1 functions to mobilize auxin from the root apex to the differentiation zone where this signal promotes hair elongation when roots encounter low external P. We conclude that auxin and OsAUX1 play key roles in promoting root foraging for P in rice. Plant root architecture can adapt to different nutrient conditions in the soil. Here Giri et al. show that the rice auxin influx carrier AUX1 mobilizes auxin from the root apex to the differentiation zone and promotes root hair elongation when roots encounter low external phosphate.
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影响因子：
9.2
作者：
Heisler, MG;Ohno, C;Meyerowitz, EM
通讯作者：
Meyerowitz, EM
影响因子：
16.6
作者：
Dindas J;Scherzer S;Roelfsema MRG;von Meyer K;Müller HM;Al-Rasheid KAS;Palme K;Dietrich P;Becker D;Bennett MJ;Hedrich R
通讯作者：
Hedrich R
影响因子：
16.6
作者：
Bhosale R;Giri J;Pandey BK;Giehl RFH;Hartmann A;Traini R;Truskina J;Leftley N;Hanlon M;Swarup K;Rashed A;Voß U;Alonso J;Stepanova A;Yun J;Ljung K;Brown KM;Lynch JP;Dolan L;Vernoux T;Bishopp A;Wells D;von Wirén N;Bennett MJ;Swarup R
通讯作者：
Swarup R
影响因子：
7.7
作者：
Kanno S;Arrighi JF;Chiarenza S;Bayle V;Berthomé R;Péret B;Javot H;Delannoy E;Marin E;Nakanishi TM;Thibaud MC;Nussaume L
通讯作者：
Nussaume L
影响因子：
7.2
作者：
Pitts, RJ;Cernac, A;Estelle, M
通讯作者：
Estelle, M