Arid
DOI10.1007/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
ISSN0100-8404
EISSN1806-9959
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
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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.
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