Arid
DOI10.1016/j.plaphy.2017.07.026
Photosynthetic limitation and mechanisms of photoprotection under drought and recovery of Calotropis procera, an evergreen C-3 from arid regions
Rivas, Rebeca1; Frosi, Gabriella1; Ramos, Diego G.1; Pereira, Silvia1; Benko-Iseppon, Ana M.2; Santos, Mauro G.1
通讯作者Santos, Mauro G.
来源期刊PLANT PHYSIOLOGY AND BIOCHEMISTRY
ISSN0981-9428
出版年2017
卷号118页码:589-599
英文摘要

Calotropis procera is a C-3 plant native from arid environmental zones. It is an evergreen, shrubby, non woody plant with intense photosynthetic metabolism during the dry season. We measured photosynthetic parameters and leaf biochemical traits, such as gas exchange, photochemical parameters, A/C-i analysis, organic solutes, and antioxidant enzymes under controlled conditions in potted plants during drought stress, and following recovery conditions to obtain a better insight in the drought stress responses of C. procera. Indeed, different processes contribute to the drought stress resilience of C procera and to the fast recovery after rehydration. The parameters analyzed showed that C. procera has a high efficiency for energy dissipation. The photosynthetic machinery is protected by a robust antioxidant system and photoprotective mechanisms such as alternative pathways for electrons (photorespiration and day respiration). Under severe drought stress, increased stomatal limitation and decreased biochemical limitation permitted C procera to maintain maximum rate of Rubisco carboxylation (V-c,(max)) and photosynthetic rate (A(max)). On the other hand, limitation of stomatal or mesophyll CO2 diffusion did not impair fast recovery, maintaining Vc,max, chloroplast CO2 concentration (C-c) and mesophyll conductance (g(m)) unchanged while electron flow used for RuBP carboxylation (J(c)) and Amax increased. The ability to tolerate drought stress and the fast recovery of this evergreen C-3 species was also due to leaf anti oxidative stress enzyme activity, and photosynthetic pigments. Thus, these different drought tolerance mechanisms allowed high performance of photosynthetic metabolism by drought stressed plants during the re-watering period. (C) 2017 Elsevier Masson SAS. All rights reserved.


英文关键词A/C-i analysis Gas exchange Oxidative stress Photosynthetic metabolism Sugars metabolism Water deficit
类型Article
语种英语
国家Brazil
收录类别SCI-E
WOS记录号WOS:000411169500060
WOS关键词JATROPHA-CURCAS PLANTS ; CHLOROPHYLL FLUORESCENCE ; WATER DEFICITS ; STRESS ; LEAVES ; SUGARS ; INTENSITIES ; PEROXIDASE ; METABOLISM ; EFFICIENCY
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/2XILL650/201566
作者单位1.Univ Fed Pernambuco, Dept Bot, Lab Fisiol Vegetal, BR-50670901 Recife, PE, Brazil;
2.Univ Fed Pernambuco, Dept Genet, Lab Genet & Biotecnol Vegetal, BR-50670901 Recife, PE, Brazil
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GB/T 7714
Rivas, Rebeca,Frosi, Gabriella,Ramos, Diego G.,et al. Photosynthetic limitation and mechanisms of photoprotection under drought and recovery of Calotropis procera, an evergreen C-3 from arid regions[J],2017,118:589-599.
APA Rivas, Rebeca,Frosi, Gabriella,Ramos, Diego G.,Pereira, Silvia,Benko-Iseppon, Ana M.,&Santos, Mauro G..(2017).Photosynthetic limitation and mechanisms of photoprotection under drought and recovery of Calotropis procera, an evergreen C-3 from arid regions.PLANT PHYSIOLOGY AND BIOCHEMISTRY,118,589-599.
MLA Rivas, Rebeca,et al."Photosynthetic limitation and mechanisms of photoprotection under drought and recovery of Calotropis procera, an evergreen C-3 from arid regions".PLANT PHYSIOLOGY AND BIOCHEMISTRY 118(2017):589-599.
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