干旱区生态环境知识资源中心(Arid): Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India

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DOI	10.1007/s40415-020-00666-9
	Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India
	Goswami, Bhuwnesh; Rankawat, Rekha; Gadi, B. R.
通讯作者	Gadi, BR
来源期刊	BRAZILIAN JOURNAL OF BOTANY
ISSN	0100-8404
EISSN	1806-9959
出版年	2020
卷号	43 期号:4 页码:761-773
英文摘要	Sewan (Lasiurus sindicus Henr.) is an endemic fodder grass of low rainfall sandy habitat of hot Indian Thar desert. To understand drought responses and tolerance mechanism in Lasiurus sindicus, seedling growth, root cell viability, changes in enzymatic antioxidants and oxidative injury were assayed at early stage of seedlings in polyethylene glycol (PEG) 6000 (5, 10 and 20%)-induced drought stress. The reduction of seed germination, seedling growth, relative water content and vigor index was found with high level of PEG (10-20%), while 5% PEG slightly increased the germination and the growth parameters. A decline in pigments (Chl a, Chl b, total Chl, carotenoids), chlorophyll stability index, membrane stability index and protein content was observed, which was correlated with increased level of malondialdehyde, an indicator of excess reactive oxygen species. Results showed that increasing level of PEG activated the antioxidative enzymes, superoxide dismutase, peroxidase and catalase. Non-enzymatic antioxidants (ascorbate, phenols) and accumulation of cytosolutes (proline and sugar) for regulation of growth, osmotic potential and reactive oxygen species in drought tolerance. Overall results showed that seeds have adaptive mechanisms for germination and growth under lower level of drought, while increasing drought stress reduced growth potential of L. sindicus. It exhibited drought tolerance features, enhancement in activity of antioxidative enzyme and cytosolutes accumulation which involved in regulation of oxidative damage and osmotic adjustment for survival of the seedlings. Furthermore, our results provide important information about the physiological and antioxidative responses of the seedlings and mechanism associated with drought tolerance of L. sindicus.
英文关键词	Antioxidant system Cell viability Cytosolutes Membrane stability Vigor
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000584024400001
WOS关键词	EARLY SEEDLING GROWTH ; CHLOROPHYLL FLUORESCENCE ; BIOCHEMICAL PARAMETERS ; MEMBRANE-PERMEABILITY ; SALICYLIC-ACID ; STRESS ; SALT ; GERMINATION ; ENZYMES
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328420
作者单位	[Goswami, Bhuwnesh; Rankawat, Rekha; Gadi, B. R.] Jai Narain Vyas Univ, Stress Physiol & Mol Biol Lab, Dept Bot, Ctr Adv Study CAS, New Campus, Jodhpur 342005, Rajasthan, India
推荐引用方式 GB/T 7714	Goswami, Bhuwnesh,Rankawat, Rekha,Gadi, B. R.. Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India[J],2020,43(4):761-773.
APA	Goswami, Bhuwnesh,Rankawat, Rekha,&Gadi, B. R..(2020).Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India.BRAZILIAN JOURNAL OF BOTANY,43(4),761-773.
MLA	Goswami, Bhuwnesh,et al."Physiological and antioxidative responses associated with drought tolerance of Lasiurus sindicus Henr. endemic to Thar desert, India".BRAZILIAN JOURNAL OF BOTANY 43.4(2020):761-773.