@article{8ec536cae7794db8b7a7d849c9d36130,
title = "Casparian strip development and its potential function in salt tolerance",
abstract = "The root system is particularly affected by unfavorable conditions because it is in direct contact with the soil environment. Casparian strips, a specialized structure deposited in anticlinal walls, are characterized by the impregnation of the primary wall pores with lignin and suberin. The Casparian strips in the endo-and exodermis of vascular plant roots appear to play an important role in preventing the non-selective apoplastic bypass of salts into the stele along the apoplast under salt stress. However, only a few investigations have examined the deposition and function of these apoplastic barriers in response to salt stress in higher plants.",
keywords = "Casparian strip, Chemical components, Development, Root",
author = "Tong Chen and Xia Cai and Xiaoqin Wu and Ichirou Karahara and Lucas Schreiber and Jinxing Lin",
note = "Funding Information: Shannon et al. showed that salinity leads to an increase in suberisation levels in the hypo-and endodermis paralleled by Higher plants have developed various mechanisms to deal Casparian strip formation.25 Similar results were also found in with Na+ uptake and transport into shoots under saline stress. castor bean, in which the degree of suberisation in the endodermal Casparian strips form a barrier to the apoplastic flux, forcing and hypodermal cell walls increased significantly in the presence ions to pass through the selectively permeable plasma membrane of NaCl.14 In addition, salinity can induce exodermis formation into the cytoplasm, rather than move along the cell wall. Since in cotton seedling roots.15 The effects of different unfavorable the strip density, amounts of suberin and lignin and hydropho-environmental factors, such as salt (NaCl), osmotic (PEG) and bic components of the strip are thought to affect the efficacy of heavy metals (Cd) stress, on the chemical composition of the exo-Casparian strip as a barrier, further efforts should be expended dermal cell walls of hydroponically grown corn showed that the to determine whether modifications in the endodermal cell walls qualitative composition of the exodermal suberin and lignin was in response to salt stress affect the radial transport properties not altered.9 Nevertheless, in all cases, the absolute amounts of of roots. Investigating how the width of the Casparian strips is suberin and lignin increased by 1.5-to 3-fold compared with the determined in response to salinity and which proteins are depos-control, indicating that elevated levels of suberisation and ligni-ited in Casparian strips would also be useful. This could be rel-fication in the exodermis can lead to greater resistance, thereby evant for biotechnological improvements in crop productivity in reducing the uptake of salts or other toxic solutes into the stele. various stressful habitats. Furthermore, salt stress was also reported to activate lignin depo- sition and reduce the apoplastic transport in soybean roots, a Acknowledgments phenomenon that may either strengthen the Casparian strip or This work was supported by an International Science and provid{\"U}e an alternative hydrophobic barrier to bypass flow.29 Using Technology Cooperation Program from Ministry of Science Funding Information: + + -BOEFT#JPTDJFODF the K /Na selectivity of potassium channels and the existence cooperation project from Sino-German Center (GZ616), grants of an apoplastic barrier in the salt-tolerance mechanism of alkali from Ministry of Agriculture of China (2009ZX08009-011B grass (Puccinellia tenuiflora) compared with wheat (Triticum aes- and 2009ZX08009-095B) and a grant from the Knowledge",
year = "2011",
month = oct,
doi = "10.4161/psb.6.10.17054",
language = "英語",
volume = "6",
pages = "1499--1502",
journal = "Plant Signaling and Behavior",
issn = "1559-2316",
publisher = "Landes Bioscience",
number = "10",
}