Salinity stiffens the epidermal cell walls of salt-stressed maize leaves: is the epidermis growth-restricting?

PloS One
Christian ZörbChristoph-Martin Geilfus

Abstract

As a result of salt (NaCl)-stress, sensitive varieties of maize (Zea mays L.) respond with a strong inhibition of organ growth. The reduction of leaf elongation investigated here has several causes, including a modification of the mechanical properties of the cell wall. Among the various tissues that form the leaf, the epidermis plays a special role in controlling organ growth, because it is thought to form a rigid outer leaf coat that can restrict elongation by interacting with the inner cell layers. This study was designed to determine whether growth-related changes in the leaf epidermis and its cell wall correspond to the overall reduction in cell expansion of maize leaves during an osmotic stress-phase induced by salt treatment. Two different maize varieties contrasting in their degree of salt resistance (i.e., the hybrids Lector vs. SR03) were compared in order to identify physiological features contributing to resistance towards salinity. Wall loosening-related parameters, such as the capacity of the epidermal cell wall to expand, β-expansin abundance and apoplastic pH values, were analysed. Our data demonstrate that, in the salt-tolerant maize hybrid which maintained leaf growth under salinity, the epidermal cell wall wa...Continue Reading

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Citations

Jul 21, 2015·International Journal of Molecular Sciences·Marc BehrGea Guerriero
Feb 19, 2016·Plant Cell Reports·Prince MarowaYingzhen Kong
Jan 7, 2016·Frontiers in Plant Science·Hirotomo Takatsuka, Masaaki Umeda
Oct 23, 2015·Trends in Plant Science·Viktoriya AvramovaGerrit T S Beemster
Feb 24, 2016·Development·Yohei KatagiriHirokazu Tsukaya
Jul 31, 2018·Plant Biology·C ZörbK-J Dietz
Aug 31, 2019·The Plant Journal : for Cell and Molecular Biology·Tian ZhangDaniel J Cosgrove
Oct 1, 2019·Plant Signaling & Behavior·Maryam SeifikalhorTao Li
Oct 30, 2018·Frontiers in Plant Science·Zhilei JiangYidan Li
Jan 24, 2020·Frontiers in Plant Science·Maria L BorniegoDana E Martinez

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Methods Mentioned

BETA
light microscopy
salt stress
salt treatment

Software Mentioned

TINA
LAS AF

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