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The effects of cation ratios on root lamella suberization in rice (Oryza sativa L.) with contrasting salt tolerance


Momayezi, Mohammad Reza and Abdul Rahman, Zaharah and Musa, Mohamed Hanafi (2012) The effects of cation ratios on root lamella suberization in rice (Oryza sativa L.) with contrasting salt tolerance. International Journal of Agronomy, 2012. art. no. 769196. pp. 1-8. ISSN 1687-8159; ESSN: 1687-8167


Rice is an important produced cereal in the world. We evaluated the effect of salt compositions including NaCl and Na2SO4 on suberin lamellae as a major barrier to radial ion and water movements in two rice genotypes representing contrasting salt tolerance levels under salinity stress. Two rice genotypes, Fajr as salt tolerant and Khazar as salt sensitive, were transplanted in sand culture under glasshouse condition. Rice seedlings were treated with five salt compositions including NaCl, Na2SO4, 1 : 1, 1 : 2, and 2 : 1 molar ratios for 40 days. It was proven that suberin lamellae in endodermis of root cell wall were thickened with Na2SO4 treatment. The results demonstrated that the number of passage cells was higher in Fajr genotype than that in Khazar genotype under saline condition. Calcium concentration in root tissue decreased as the SO42- concentration in root media increased. It can be concluded that Fajr genotype is able to keep some passage cells open to maintain Ca2+ uptake. The Ca2+/Na+ ratio in shoot tissue can be also a reliable index for the early recognition of salt stress in these rice genotypes.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: https://doi.org/10.1155/2012/769196
Publisher: Hindawi Publishing Corporation
Keywords: Salt compositions; Rice; Suberin deposition; Salt tolerance; Root; Passage cells
Depositing User: Nabilah Mustapa
Date Deposited: 15 Apr 2020 16:55
Last Modified: 15 Apr 2020 16:55
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1155/2012/769196
URI: http://psasir.upm.edu.my/id/eprint/52506
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