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Amelioration of drought-induced negative responses by elevated CO sub(2) in field grown short rotation coppice mulberry (Morus spp.), a potential bio-energy tree crop

Photosynthesis research, 2017-05, Vol.132 (2), p.151-164 [Peer Reviewed Journal]

ISSN: 0166-8595 ;EISSN: 1573-5079 ;DOI: 10.1007/s11120-017-0351-5

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  • Title:
    Amelioration of drought-induced negative responses by elevated CO sub(2) in field grown short rotation coppice mulberry (Morus spp.), a potential bio-energy tree crop
  • Author: Sekhar, Kalva Madhana ; Reddy, Kanubothula Sitarami ; Reddy, Attipalli Ramachandra
  • Subjects: Morus
  • Is Part Of: Photosynthesis research, 2017-05, Vol.132 (2), p.151-164
  • Description: Present study describes the responses of short rotation coppice (SRC) mulberry, a potential bio-energy tree, grown under interactive environment of elevated CO sub(2) (E) and water stress (WS). Growth in E stimulated photosynthetic performance in well-watered (WW) as well as during WS with significant increases in light-saturated photosynthetic rates (A sub(Sat)), water use efficiency (WUE sub(i)), intercellular [CO sub(2)], and photosystem-II efficiency (F sub(V)/F sub(M) and Delta F/F sub(M)') with concomitant reduction in stomatal conductance (g sub(s)) and transpiration (E) compared to ambient CO sub(2) (A) grown plants. Reduced levels of proline, H sub(2)O sub(2,) and malondialdehyde (MDA) and higher contents of antioxidants including ascorbic acid and total phenolics in WW and WS in E plants clearly demonstrated lesser oxidative damage. Further, A plants showed higher transcript abundance and antioxidant enzyme activities under WW as well as during initial stages of WS (15 days). However, with increasing drought imposition (30 days), A plants showed down regulation of antioxidant systems compared to their respective E plants. These results clearly demonstrated that future increased atmospheric CO sub(2) enhances the photosynthetic potential and also mitigate the drought-induced oxidative stress in SRC mulberry. In conclusion, mulberry is a potential bio-energy tree crop which is best suitable for short rotation coppice forestry-based mitigation of increased [CO sub(2)] levels even under intermittent drought conditions, projected to prevail in the fast-changing global climate.
  • Language: English
  • Identifier: ISSN: 0166-8595
    EISSN: 1573-5079
    DOI: 10.1007/s11120-017-0351-5
  • Source: ProQuest Central
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