Exogenous application of plant growth regulators induce chilling tolerance in direct seeded super and non-super rice seedlings through modulations in morpho-physiological attributes

Z.W. Mo; U. Ashraf; S.G. Pan; A.S. Kanu; W. Li; M.Y. Duan; H. Tian; X.R. Tang

doi:10.1556/0806.44.2016.010

Cereal Research Communications

Volume/Issue:: Volume 44: Issue 3

Exogenous application of plant growth regulators induce chilling tolerance in direct seeded super and non-super rice seedlings through modulations in morpho-physiological attributes

Authors:

Z.W. Mo

Z.W. Mo South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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U. Ashraf

U. Ashraf South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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S.G. Pan

S.G. Pan South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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A.S. Kanu

A.S. Kanu South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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W. Li

W. Li Guangdong Academy of Agricultural Sciences, Guangdong 510640, PR China

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M.Y. Duan

M.Y. Duan South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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H. Tian

H. Tian South China Agricultural University, Guangzhou 510642, PR China
South China Agricultural University, Guangzhou 510642, PR China

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X.R. Tang

X.R. Tang South China Agricultural University, Guangzhou 510642, PR China
Ministry of Agriculture, P.R. China, Guangzhou, 510642, China

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Pages:: 524–534

Online Publication Date:: Sep 2016

Publication Date:: 01 Sep 2016

Article Category:: Research Article

DOI:: https://doi.org/10.1556/0806.44.2016.010

Keywords:: antioxidant enzymes; chilling stress; rice seedlings; survival rates

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Recently, super rice has gained much importance due to its high yield potential while exogenous application of plant growth regulators (PGRs) is an important aspect in plant development and defense responses under stress conditions. In this study we conducted two pot experiments. Firstly, four super rice cultivars, viz. Peizataifeng, Huayou 213, Yuxiangyouzhan and Huahang 31 were subjected to a series of five chilling temperatures, i.e. 11 °C, 12 °C, 13 °C, 14 °C and 15 °C (day/night) for about 25–27 days. Secondly, seeds of Peizataifeng (super rice) and Yuejingsimiao 2 (non-super rice) were then treated with different combinations of salicylic acid (SA), brassinolide (BR), calcium chloride (CaCl₂) and fulvic acid (FA) and then exposed to chilling stress at 13 °C for four days. Resultantly, Peizataifen (super rice) was found with the lowest seedling survival rate at all chilling temperatures among all four super rice cultivars, however, it was still found more resistant when compared with Yuejingsimiao 2 (non-super rice) in the second experiment. Furthermore synergistic effect of all PGRs alleviated low temperature stress in both rice cultivars by improving seedling survival rates, leaf area, seedling dry weight, seedling height, root morphology and by modulating antioxidant enzymes, improving proline content and lowering lipid peroxidation.

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Cereal Research Communications A Quarterly of the Cereal Research Non-Profit Ltd. Company

Print ISSN:: 0133-3720

Online ISSN:: 1788-9170

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Cereal Research Communications
Language	English
Size	A4
Year of Foundation	1973
Volumes per Year	1
Issues per Year	4
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0133-3720 (Print)
ISSN	1788-9170 (Online)