Changes of some anti-oxidative physiological indices under soil water deficits among 10 wheat (Triticum aestivum L.) genotypes at tillering stage

Shao, Hongbo; Chu, Li-Ye; Wu, Gang; Zhang, Jinheng; Lu, Zhaohua; Hu, Yuanyi

doi:10.1016/j.colsurfb.2006.09.004

Cited by 113 publications

(95 citation statements)

References 46 publications

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“…POD, SOD, CAT and MDA are common and important indices for evaluating the status of wheat redox, whose activities of the former 3 and whose lower of MDA display higher anti-oxidative ability, reflecting higher resistance drought [1,5,48,49]. In our experiment, our former results showed that different wheat genotypes clearly responded to soil water deficiency differently in terms of activities of POD, SOD, CAT and MDA content [59]. This further implied that different wheat genotypes had discrete water stress threshold and therefore they had different physiological adaptive mechanism to regulate their redox status [35,59].…”

Section: Discussionmentioning

confidence: 54%

“…In our experiment, our former results showed that different wheat genotypes clearly responded to soil water deficiency differently in terms of activities of POD, SOD, CAT and MDA content [59]. This further implied that different wheat genotypes had discrete water stress threshold and therefore they had different physiological adaptive mechanism to regulate their redox status [35,59]. Obviously, the difference in this aspect exhibited the difference in their alleles of different wheat genotypes [16,19,52,70].…”

Section: Discussionmentioning

confidence: 70%

“…If environmental changes are too extreme to allow short-term metabolic controls to maintain fluxes through primary metabolism while preventing uncontrolled oxidation, then stress-induced damage ensues. Here, there is an obvious stress threshold [1,58,59]. In this situation acclamatory changes in gene expression are induced in attempt to restore redox homeostasis [73,75].…”

Section: Discussionmentioning

confidence: 99%

“…In this situation acclamatory changes in gene expression are induced in attempt to restore redox homeostasis [73,75]. If the repertoire of genomic responses is not insufficient or not appropriate then primary metabolism is impaired, oxidative stress becomes increasingly important and cell death and senescence responses are triggered [5,59,61]. One of the earliest responses of plants to pathogens, wounding, drought, extremes of temperature or physical and chemical shocks is the accumulation of active oxygen species (AOS) such as superoxide, hydroxyl radicals, hydrogen peroxide and singlet oxygen [35].…”

Section: Discussionmentioning

confidence: 99%

“…Towards this aim, many promising methodologies appear, but they should also be linked with field practice [12,13,18,24,29,31,40,51,72]. Wheat is a staple food for more than 35% of the world population and wheat is also the second grain crop in China, whose production status is directly related to social stability, Chinese survival and sustainable development [13,21,22,30,37,38,59,65]. With progressive global climate change and increasing shortage of water resources and worsening eco-environment, wheat production is influenced greatly [8,38,52].…”

Section: Introductionmentioning

confidence: 99%

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Relationship between water use efficiency (WUE) and production of different wheat genotypes at soil water deficit

Shao

Chu

et al. 2006

Colloids and Surfaces B: Biointerfaces

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Through 2-year field experiments, 7 wheat genotypes were better in their field yield. These 7 wheat genotypes and other 3 wheat species, which are being popularized on a large scale in different locations of China, were selected as experimental materials for the sake of measuring their difference in WUE and production and comparing their relationship at soil water deficits, future more, providing better drought resistance lines and theoretical guide for wheat production and practices and exploring anti-drought physiological mechanisms of different wheat genotypes. Under the condition of 3 soil-water-stress treatments (75% field capacity (FC), 55% FC, 45% FC, named level 1, level 2 and level 3, respectively), pot experiments for them were conducted and the related data were collected from their life circle. The main results were as followed: (1) according to the selected soil stress levels, water use efficiency (WUE) of 10 different wheat genotypes was divided into two groups (A and B); group A included genotypes 2, 3, 4, 5, 6, 7, 8, whose WUE decreased basically from level 1 to level 3 and reached individual peak of WUE at level 1; Group 2 included genotypes 1, 9, 10, whose WUE reached their individual peak at level 2; (2) based on total water consumption through all life circle, genotypes 1, 4, 8, 9 had lower water consumption (TWC) at level 1, genotypes 2, 3, 5, 6, 7 lower TWC at level 2, genotype 10 lower TWC at level 3; (3) at level 1, genotypes 2, 3, 4, 5, 6, 7, 8 had higher grain weight of single spike (GWSS), genotypes 1, 9, 10 better GWSS at level 2, which was in good line with individual WUE of different wheat genotypes; (4) by analyzing the indexes related to examining cultivars, it was found that genotypes 1, 2, 3, 4, 5, 6, 9, 10 had longer plant length (PL), spike length (SL), bigger grain number (GN) except genotypes 7 and 8 at level 1, RL was in better line with genotypes 1, 2, 3, 8, 9, 10, but not in the other genotypes at level 1.

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