Drought enhances maize chilling tolerance.: II.: Photosynthetic traits and protective mechanisms against oxidative stress

被引：118
作者：
Aroca, R [1 ]
Irigoyen, JJ [1 ]
Sánchez-Díaz, M [1 ]
机构：
[1] Univ Navarra, Dept Fisiol Vegetal, Pamplona 31008, Spain
来源：
PHYSIOLOGIA PLANTARUM | 2003年 / 117卷 / 04期
关键词：
D O I：
10.1034/j.1399-3054.2003.00065.x
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
In the present research we studied the photosynthetic traits and protective mechanisms against oxidative stress in two maize (Zea mays L.) genotypes differing in chilling sensitivity (Z7, tolerant and Penjalinan, sensitive) subjected to 5degreesC for 5 days, with or without pretreatment by drought. The drought pretreatment decreased the symptoms of chilling injury in Penjalinan plants estimated as necrotic leaf area and maximum quantum yield of photosystem II. Furthermore, drought pretreatment diminished the level of lipid peroxidation caused by chilling in Penjalinan plants. After one day of recovery from chilling the Z7 and drought-pretreated Penjalinan plants showed higher net photosynthesis rates than the non-drought-pretreated Penjalinan plants, thereby decreasing the probability of generating reactive oxygen species. The greater net photosynthesis was correlated with the greater NADP-malate dehydrogenase activity. No differences in either the de-epoxidation state of the xanthophyll cycle or the antioxidant enzyme activities were found among the chilled groups of plants. However, a drastic decrease in ascorbate content was observed in chilled Penjalinan plants without drought pretreatment. As we found an increase of H-2 O-2 content after drought pretreatment, we suggest its involvement as a signal in the drought-enhanced chilling tolerance of maize.
引用
收藏
页码：540 / 549
页数：10
相关论文
共 40 条
[21]   Effect of chilling on carbon assimilation, enzyme activation, and photosynthetic electron transport in the absence of photoinhibition in maize leaves [J].
KingstonSmith, AH ;
Harbinson, J ;
Williams, J ;
Foyer, CH .
PLANT PHYSIOLOGY, 1997, 114 (03) :1039-1046
[22]   Artificially increased ascorbate content affects zeaxanthin formation but not thermal energy dissipation or degradation of antioxidants during cold-induced photooxidative stress in maize leaves [J].
Leipner, J ;
Stamp, P ;
Fracheboud, Y .
PLANTA, 2000, 210 (06) :964-969
[23]   Acclimation by suboptimal growth temperature diminishes photooxidative damage in maize leaves [J].
Leipner, J ;
Fracheboud, Y ;
Stamp, P .
PLANT CELL AND ENVIRONMENT, 1997, 20 (03) :366-372
[24]   IMPROVED SPECTROPHOTOMETRIC ASSAY FOR RIBULOSE-BIS-PHOSPHATE CARBOXYLASE [J].
LILLEY, RM ;
WALKER, DA .
BIOCHIMICA ET BIOPHYSICA ACTA, 1974, 358 (01) :226-229
[25]  
LONG SP, 1983, PLANT CELL ENVIRON, V6, P345
[26]   INFLUENCE OF OXYGEN AND TEMPERATURE ON THE DARK INACTIVATION OF PYRUVATE, ORTHO-PHOSPHATE DIKINASE AND NADP-MALATE DEHYDROGENASE IN MAIZE [J].
NAKAMOTO, H ;
EDWARDS, GE .
PLANT PHYSIOLOGY, 1983, 71 (03) :568-573
[27]   Common components, networks, and pathways of cross-tolerance to stress. The central role of "redox" and abscisic acid-mediated controls [J].
Pastori, GM ;
Foyer, CH .
PLANT PHYSIOLOGY, 2002, 129 (02) :460-468
[28]   ESTIMATION OF HYDROGEN-PEROXIDE IN PLANT-EXTRACTS USING TITANIUM(IV) [J].
PATTERSON, BD ;
MACRAE, EA ;
FERGUSON, IB .
ANALYTICAL BIOCHEMISTRY, 1984, 139 (02) :487-492
[29]   Changes in activities of antioxidant enzymes and their relationship to genetic and paclobutrazol-induced chilling tolerance of maize seedlings [J].
Pinhero, RG ;
Rao, MV ;
Paliyath, G ;
Murr, DP ;
Fletcher, RA .
PLANT PHYSIOLOGY, 1997, 114 (02) :695-704
[30]   EVIDENCE FOR CHILLING-INDUCED OXIDATIVE STRESS IN MAIZE SEEDLINGS AND A REGULATORY ROLE FOR HYDROGEN-PEROXIDE [J].
PRASAD, TK ;
ANDERSON, MD ;
MARTIN, BA ;
STEWART, CR .
PLANT CELL, 1994, 6 (01) :65-74
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