Superoxide dismutase and ascorbate peroxidase improve the recovery of photosynthesis in sugarcane plants subjected to water deficit and low substrate temperature

Bibliographische Detailangaben
Veröffentlicht in:	Plant physiology and biochemistry : PPB. - 1991. - 73(2013) vom: 15. Dez., Seite 326-36
1. Verfasser:	Sales, Cristina R G (VerfasserIn)
Weitere Verfasser:	Ribeiro, Rafael V, Silveira, Joaquim A G, Machado, Eduardo C, Martins, Marcio O, Lagôa, Ana Maria M A
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2013
Zugriff auf das übergeordnete Werk:	Plant physiology and biochemistry : PPB
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't APX C CAT CD Cold D E ETR mehr... ETR/P(N) EXC F(V)/F(M) H(2)O(2) NPQ Oxidative stress P(N) PET PPFD PSII Photochemical activity Photosynthesis R RDM ROS SDM SOD Saccharum spp. TBARS TDM Water deficit actual quantum yield of PSII apparent electron transport rate ascorbate-peroxidase catalase cold treatment cold + drought treatment dag days after germination drought treatment g(s) hydrogen peroxide leaf CO(2) assimilation leaf water potential maximum quantum yield of PSII non-photochemical quenching photosynthetic electron transport photosynthetic photon flux density photosystem II ratio between the apparent electron transport rate and leaf CO(2) assimilation reactive oxygen species reference treatment relative excessive photosynthetic photon flux density root dry matter shoot dry matter stomatal conductance superoxide dismutase thiobarbituric acid-reactive substances total dry matter transpiration ΔF/F(M)′ Ψ(w) Antioxidants Photosystem II Protein Complex Water 059QF0KO0R Ascorbate Peroxidases EC 1.11.1.11 Superoxide Dismutase EC 1.15.1.1

Beschreibung
Zusammenfassung:	Copyright © 2013 Elsevier Masson SAS. All rights reserved. The physiological responses of C4 species to simultaneous water deficit and low substrate temperature are poorly understood, as well as the recovery capacity. This study investigated whether the effect of these abiotic stressors is cultivar-dependent. The differential responses of drought-resistant (IACSP94-2094) and drought-sensitive (IACSP97-7065) sugarcane cultivars were characterized to assess the relationship between photosynthesis and antioxidant protection by APX and SOD isoforms under stress conditions. Our results show that drought alone or combined with low root temperature led to excessive energetic pressure at the PSII level. Heat dissipation was increased in both genotypes, but the high antioxidant capacity due to higher SOD and APX activities was genotype-dependent and it operated better in the drought-resistant genotype. High SOD and APX activities were associated with a rapid recovery of photosynthesis in IACSP94-2094 plants after drought and low substrate temperature alone or simultaneously
Beschreibung:	Date Completed 29.07.2014 Date Revised 30.09.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1873-2690
DOI:	10.1016/j.plaphy.2013.10.012