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Rice microtubule‐associated protein IQ67‐DOMAIN14 regulates rice grain shape by modulating microtubule cytoskeleton dynamics

Baojun Yang (UGent) , Jos Wendrich (UGent) , Bert De Rybel (UGent) , Dolf Weijers and Hong‐Wei Xue
(2020) PLANT BIOTECHNOLOGY JOURNAL. 18(5). p.1141-1152
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Abstract
Cortical microtubule (MT) arrays play a critical role in plant cell shape determination by defining the direction of cell expansion. As plants continuously adapt to ever‐changing environmental conditions, multiple environmental and developmental inputs need to be translated into changes of the MT cytoskeleton. Here, we identify and functionally characterize an auxin‐inducible and MT‐localized protein OsIQ67‐DOMAIN14 (OsIQD14), which is highly expressed in rice seed hull cells. We show that while deficiency of OsIQD14 results in short and wide seeds and increases overall yield, overexpression leads to narrow and long seeds, caused by changed MT alignment. We further show that OsIQD14‐mediated MT reordering is regulated by specifically affecting MT dynamics, and ectopic expression of OsIQD14 in Arabidopsis could change the cell shape both in pavement cells and hypocotyl cells. Additionally, OsIQD14 activity is tightly controlled by calmodulin proteins, providing an alternative way to modify the OsIQD14 activity. Our results indicate that OsIQD14 acts as a key factor in regulating MT rearrangements in rice hull cells and hence the grain shape, and allows effective local cell shape manipulation to improve the rice yield trait.
Keywords
calmodulin (CaM), cell shape, microtubule, OsIQD14, rice

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MLA
Yang, Baojun, et al. “Rice Microtubule‐associated Protein IQ67‐DOMAIN14 Regulates Rice Grain Shape by Modulating Microtubule Cytoskeleton Dynamics.” PLANT BIOTECHNOLOGY JOURNAL, vol. 18, no. 5, Wiley, 2020, pp. 1141–52.
APA
Yang, B., Wendrich, J., De Rybel, B., Weijers, D., & Xue, H. (2020). Rice microtubule‐associated protein IQ67‐DOMAIN14 regulates rice grain shape by modulating microtubule cytoskeleton dynamics. PLANT BIOTECHNOLOGY JOURNAL, 18(5), 1141–1152.
Chicago author-date
Yang, Baojun, Jos Wendrich, Bert De Rybel, Dolf Weijers, and Hong‐Wei Xue. 2020. “Rice Microtubule‐associated Protein IQ67‐DOMAIN14 Regulates Rice Grain Shape by Modulating Microtubule Cytoskeleton Dynamics.” PLANT BIOTECHNOLOGY JOURNAL 18 (5): 1141–52.
Chicago author-date (all authors)
Yang, Baojun, Jos Wendrich, Bert De Rybel, Dolf Weijers, and Hong‐Wei Xue. 2020. “Rice Microtubule‐associated Protein IQ67‐DOMAIN14 Regulates Rice Grain Shape by Modulating Microtubule Cytoskeleton Dynamics.” PLANT BIOTECHNOLOGY JOURNAL 18 (5): 1141–1152.
Vancouver
1.
Yang B, Wendrich J, De Rybel B, Weijers D, Xue H. Rice microtubule‐associated protein IQ67‐DOMAIN14 regulates rice grain shape by modulating microtubule cytoskeleton dynamics. PLANT BIOTECHNOLOGY JOURNAL. 2020;18(5):1141–52.
IEEE
[1]
B. Yang, J. Wendrich, B. De Rybel, D. Weijers, and H. Xue, “Rice microtubule‐associated protein IQ67‐DOMAIN14 regulates rice grain shape by modulating microtubule cytoskeleton dynamics,” PLANT BIOTECHNOLOGY JOURNAL, vol. 18, no. 5, pp. 1141–1152, 2020.
@article{8632297,
  abstract     = {Cortical microtubule (MT) arrays play a critical role in plant cell shape determination by defining the direction of cell expansion. As plants continuously adapt to ever‐changing environmental conditions, multiple environmental and developmental inputs need to be translated into changes of the MT cytoskeleton. Here, we identify and functionally characterize an auxin‐inducible and MT‐localized protein OsIQ67‐DOMAIN14 (OsIQD14), which is highly expressed in rice seed hull cells. We show that while deficiency of OsIQD14 results in short and wide seeds and increases overall yield, overexpression leads to narrow and long seeds, caused by changed MT alignment. We further show that OsIQD14‐mediated MT reordering is regulated by specifically affecting MT dynamics, and ectopic expression of OsIQD14 in Arabidopsis could change the cell shape both in pavement cells and hypocotyl cells. Additionally, OsIQD14 activity is tightly controlled by calmodulin proteins, providing an alternative way to modify the OsIQD14 activity. Our results indicate that OsIQD14 acts as a key factor in regulating MT rearrangements in rice hull cells and hence the grain shape, and allows effective local cell shape manipulation to improve the rice yield trait.},
  author       = {Yang, Baojun and Wendrich, Jos and De Rybel, Bert and Weijers, Dolf and Xue, Hong‐Wei},
  issn         = {1467-7644},
  journal      = {PLANT BIOTECHNOLOGY JOURNAL},
  keywords     = {calmodulin (CaM),cell shape,microtubule,OsIQD14,rice},
  language     = {eng},
  number       = {5},
  pages        = {1141--1152},
  publisher    = {Wiley},
  title        = {Rice microtubule‐associated protein IQ67‐DOMAIN14 regulates rice grain shape by modulating microtubule cytoskeleton dynamics},
  url          = {http://dx.doi.org/10.1111/pbi.13279},
  volume       = {18},
  year         = {2020},
}
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