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Root hydrotropism is controlled via a cortex-specific growth mechanism

(2017) NATURE PLANTS. 3(6).
Author
Organization
Abstract
Plants can acclimate by using tropisms to link the direction of growth to environmental conditions. Hydrotropism allows roots to forage for water, a process known to depend on abscisic acid (ABA) but whose molecular and cellular basis remains unclear. Here we show that hydrotropism still occurs in roots after laser ablation removed the meristem and root cap. Additionally, targeted expression studies reveal that hydrotropism depends on the ABA signalling kinase SnRK2.2 and the hydrotropism-specific MIZ1, both acting specifically in elongation zone cortical cells. Conversely, hydrotropism, but not gravitropism, is inhibited by preventing differential cell-length increases in the cortex, but not in other cell types. We conclude that root tropic responses to gravity and water are driven by distinct tissue-based mechanisms. In addition, unlike its role in root gravitropism, the elongation zone performs a dual function during a hydrotropic response, both sensing a water potential gradient and subsequently undergoing differential growth.
Keywords
ABSCISIC-ACID ACCUMULATION, ARABIDOPSIS-THALIANA, AUXIN TRANSPORT, GENE-EXPRESSION, CELL-DIVISION, PEA MUTANT, CAP CELLS, PROTEIN, GRAVITROPISM, ELONGATION

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Citation

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MLA
Dietrich, Daniela et al. “Root Hydrotropism Is Controlled via a Cortex-specific Growth Mechanism.” NATURE PLANTS 3.6 (2017): n. pag. Print.
APA
Dietrich, D., Pang, L., Kobayashi, A., Fozard, J. A., Boudolf, V., Bhosale, R., Antoni, R., et al. (2017). Root hydrotropism is controlled via a cortex-specific growth mechanism. NATURE PLANTS, 3(6).
Chicago author-date
Dietrich, Daniela, Lei Pang, Akie Kobayashi, John A Fozard, Véronique Boudolf, Rahul Bhosale, Regina Antoni, et al. 2017. “Root Hydrotropism Is Controlled via a Cortex-specific Growth Mechanism.” Nature Plants 3 (6).
Chicago author-date (all authors)
Dietrich, Daniela, Lei Pang, Akie Kobayashi, John A Fozard, Véronique Boudolf, Rahul Bhosale, Regina Antoni, Tuan Nguyen Tuan Nguyen, Sotaro Hiratsuka, Nobuharu Fujii, Yutaka Miyazawa, Tae-Woong Bae, Darren M Wells, Markus R Owen, Leah R Band, Rosemary J Dyson, Oliver E Jensen, John R King, Saoirse R Tracy, Craig J Sturrock, Sacha J Mooney, Jeremy A Roberts, Rishikesh P Bhalerao, Jose R Dinneny, Pedro L Rodriguez, Akira Nagatani, Yoichiroh Hosokawa, Tobias I Baskin, Tony P Pridmore, Lieven De Veylder, Hideyuki Takahashi, and Malcolm J Bennett. 2017. “Root Hydrotropism Is Controlled via a Cortex-specific Growth Mechanism.” Nature Plants 3 (6).
Vancouver
1.
Dietrich D, Pang L, Kobayashi A, Fozard JA, Boudolf V, Bhosale R, et al. Root hydrotropism is controlled via a cortex-specific growth mechanism. NATURE PLANTS. 2017;3(6).
IEEE
[1]
D. Dietrich et al., “Root hydrotropism is controlled via a cortex-specific growth mechanism,” NATURE PLANTS, vol. 3, no. 6, 2017.
@article{8528584,
  abstract     = {Plants can acclimate by using tropisms to link the direction of growth to environmental conditions. Hydrotropism allows roots to forage for water, a process known to depend on abscisic acid (ABA) but whose molecular and cellular basis remains unclear. Here we show that hydrotropism still occurs in roots after laser ablation removed the meristem and root cap. Additionally, targeted expression studies reveal that hydrotropism depends on the ABA signalling kinase SnRK2.2 and the hydrotropism-specific MIZ1, both acting specifically in elongation zone cortical cells. Conversely, hydrotropism, but not gravitropism, is inhibited by preventing differential cell-length increases in the cortex, but not in other cell types. We conclude that root tropic responses to gravity and water are driven by distinct tissue-based mechanisms. In addition, unlike its role in root gravitropism, the elongation zone performs a dual function during a hydrotropic response, both sensing a water potential gradient and subsequently undergoing differential growth.},
  articleno    = {17057},
  author       = {Dietrich, Daniela and Pang, Lei and Kobayashi, Akie and Fozard, John A and Boudolf, Véronique and Bhosale, Rahul and Antoni, Regina and Tuan Nguyen, Tuan Nguyen and Hiratsuka, Sotaro and Fujii, Nobuharu and Miyazawa, Yutaka and Bae, Tae-Woong and Wells, Darren M and Owen, Markus R and Band, Leah R and Dyson, Rosemary J and Jensen, Oliver E and King, John R and Tracy, Saoirse R and Sturrock, Craig J and Mooney, Sacha J and Roberts, Jeremy A and Bhalerao, Rishikesh P and Dinneny, Jose R and Rodriguez, Pedro L and Nagatani, Akira and Hosokawa, Yoichiroh and Baskin, Tobias I and Pridmore, Tony P and De Veylder, Lieven and Takahashi, Hideyuki and Bennett, Malcolm J},
  issn         = {2055-026X},
  journal      = {NATURE PLANTS},
  keywords     = {ABSCISIC-ACID ACCUMULATION,ARABIDOPSIS-THALIANA,AUXIN TRANSPORT,GENE-EXPRESSION,CELL-DIVISION,PEA MUTANT,CAP CELLS,PROTEIN,GRAVITROPISM,ELONGATION},
  language     = {eng},
  number       = {6},
  pages        = {8},
  title        = {Root hydrotropism is controlled via a cortex-specific growth mechanism},
  url          = {http://dx.doi.org/10.1038/nplants.2017.57},
  volume       = {3},
  year         = {2017},
}

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