A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate.
A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate.
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DOI：
10.1038/s41467-018-03851-3
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发表时间：
2018-04-12
影响因子：
16.6
通讯作者：
Swarup R
中科院分区：
文献类型：
--
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
磷是植物生长所必需的大量营养元素。根系利用适应机制在土壤中寻找磷。根毛的伸长是特别重要的，因为P是不动的。在这里，我们报告生长素起着至关重要的作用，促进根毛生长在拟南芥中响应低外部P。突变体破坏生长素合成（taa1）和运输（aux1）减弱低P根毛反应。相反，靶向AUX 1在侧根帽和表皮细胞中的表达拯救了aux1中的这种低P响应。因此，生长素从根尖运输到分化区促进生长素依赖的毛发对低P的反应。低外部P导致诱导根毛表达生长素诱导的转录因子ARF19、RSL2和RSL4。缺乏这些基因的突变体破坏低磷根毛反应。我们得出的结论是生长素的合成，运输和响应途径的组成部分发挥关键作用，调节这种低磷根适应性反应。植物根毛伸长是对低磷土壤的反应。Bhosale等人的研究表明，根毛的伸长需要TAA1介导的生长素合成、AUX 1在侧根帽和表皮中的生长素转运以及通过生长素诱导的ARF19、RSL2和RSL4转录因子的信号传导。
Phosphate (P) is an essential macronutrient for plant growth. Roots employ adaptive mechanisms to forage for P in soil. Root hair elongation is particularly important since P is immobile. Here we report that auxin plays a critical role promoting root hair growth in Arabidopsis in response to low external P. Mutants disrupting auxin synthesis (taa1) and transport (aux1) attenuate the low P root hair response. Conversely, targeting AUX1 expression in lateral root cap and epidermal cells rescues this low P response in aux1. Hence auxin transport from the root apex to differentiation zone promotes auxin-dependent hair response to low P. Low external P results in induction of root hair expressed auxin-inducible transcription factors ARF19, RSL2, and RSL4. Mutants lacking these genes disrupt the low P root hair response. We conclude auxin synthesis, transport and response pathway components play critical roles regulating this low P root adaptive response. Plant root hairs elongate in response to low soil phosphate. Here Bhosale et al. show that root hair elongation requires auxin synthesis mediated by TAA1, auxin transport by AUX1 in the lateral root cap and epidermis, and signaling via the auxin-inducible ARF19, RSL2 and RSL4 transcription factors.
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影响因子：
14.9
作者：
Ritchie ME;Phipson B;Wu D;Hu Y;Law CW;Shi W;Smyth GK
通讯作者：
Smyth GK
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：
4.5
作者：
Bruex A;Kainkaryam RM;Wieckowski Y;Kang YH;Bernhardt C;Xia Y;Zheng X;Wang JY;Lee MM;Benfey P;Woolf PJ;Schiefelbein J
通讯作者：
Schiefelbein J
影响因子：
7.4
作者：
Giehl, Ricardo F. H.;von Wiren, Nicolaus
通讯作者：
von Wiren, Nicolaus
影响因子：
7.4
作者：
Lambers, Hans;Finnegan, Patrick M.;Veneklaas, Erik J.
通讯作者：
Veneklaas, Erik J.