Cell wall remodeling under abiotic stress.
Cell wall remodeling under abiotic stress.
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DOI:
10.3389/fpls.2014.00771
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发表时间:
2014
影响因子:
5.6
通讯作者:
Tenhaken R
中科院分区:
文献类型:
--
作者:
Tenhaken R
Plants exposed to abiotic stress respond to unfavorable conditions on multiple levels. One challenge under drought stress is to reduce shoot growth while maintaining root growth, a process requiring differential cell wall synthesis and remodeling. Key players in this process are the formation of reactive oxygen species (ROS) and peroxidases, which initially cross-link phenolic compounds and glycoproteins of the cell walls causing stiffening. The function of ROS shifts after having converted all the peroxidase substrates in the cell wall. If ROS-levels remain high during prolonged stress, OH°-radicals are formed which lead to polymer cleavage. In concert with xyloglucan modifying enzymes and expansins, the resulting cell wall loosening allows further growth of stressed organs.
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