Antioxidant Enzymes and Photosynthetic Responses to Drought Stress of Three Canna edulis Cultivars

Wen-e, Zhang; Wang, Fei; Pan, Xuejun; Tian, Zhiqiang; Zhao, Xiuming

doi:10.7235/hort.2013.13031

Cited by 5 publications

(4 citation statements)

References 48 publications

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“…Changes in water status and subsequent plant wilting are a common phenomenon under environmental stresses, especially drought (Zhang et al 2013, Chen et al 2016a. Our results showed that obvious wilting and decline in RWC occurred in wheat under osmotic stress.…”

Section: Discussionmentioning

confidence: 57%

Different responses of photosystem and antioxidant defense system to three environmental stresses in wheat seedlings

Wu¹,

Mao²,

Chen³

et al. 2020

Photosynt.

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To investigate the adaptive mechanism of wheat under high light, osmotic stress, and salt stress, redox regulation, and photosynthesis were compared. Under high light, the activities of antioxidant enzymes, except for catalase, significantly increased and then decreased after 1 and 3 h, respectively. Under osmotic stress, antioxidant enzyme activities significantly increased and subsequently declined. Except for superoxide dismutase, salt stress induced a significant increase in all the antioxidant enzyme activities. A significant decrease of D1 protein by high light and osmotic stress, strong photophosphorylation of D1 and D2 under high light and salt stress were observed, while all the stresses induced upregulation of PsbS protein. Eight stress-associated genes (TaMYB73,

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Section: Discussionmentioning

confidence: 57%

Different responses of photosystem and antioxidant defense system to three environmental stresses in wheat seedlings

Wu¹,

Mao²,

Chen³

et al. 2020

Photosynt.

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“…African arrowroot ( Canna edulis ) is a tuber crop that originated in Central and South America and is distributed throughout Europe, North America and in tropical regions of the world. The tuber contains large amounts of starch which is highly viscous, often used in cakes, noodles, dye, and animal fodder [ 66 ]. African arrowroot is also known for its horticultural use in gardening and for the treatment of industrial wastewaters to remove pollutants such as nitrogenous and phosphorous compounds [ 67 ].…”

Section: Under-utilised Speciesmentioning

confidence: 99%

Pangenomes as a Resource to Accelerate Breeding of Under-Utilised Crop Species

Fernandez

Nestor

Danilevicz

et al. 2022

IJMS

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Pangenomes are a rich resource to examine the genomic variation observed within a species or genera, supporting population genetics studies, with applications for the improvement of crop traits. Major crop species such as maize (Zea mays), rice (Oryza sativa), Brassica (Brassica spp.), and soybean (Glycine max) have had pangenomes constructed and released, and this has led to the discovery of valuable genes associated with disease resistance and yield components. However, pangenome data are not available for many less prominent crop species that are currently under-utilised. Despite many under-utilised species being important food sources in regional populations, the scarcity of genomic data for these species hinders their improvement. Here, we assess several under-utilised crops and review the pangenome approaches that could be used to build resources for their improvement. Many of these under-utilised crops are cultivated in arid or semi-arid environments, suggesting that novel genes related to drought tolerance may be identified and used for introgression into related major crop species. In addition, we discuss how previously collected data could be used to enrich pangenome functional analysis in genome-wide association studies (GWAS) based on studies in major crops. Considering the technological advances in genome sequencing, pangenome references for under-utilised species are becoming more obtainable, offering the opportunity to identify novel genes related to agro-morphological traits in these species.

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“…Antioxidant systems in various plant species have been studied, and antioxidant enzymes that effectively protect plants against oxidative damage induced by various biotic and abiotic stresses, including drought, have been found [4,8]. Drought stress research has indicated that higher antioxidant activities are detected in resistant or tolerant species/genotypes, compared with sensitive ones [9,10]; therefore, antioxidative mechanisms in drought-resistant or -tolerant species/genotypes remain a research focus [11][12][13]. The three important enzymes in the antioxidant system, SOD, POD, and CAT, have been studied intensively in various species [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Physiological adaptations to osmotic stress and characterization of a polyethylene glycol-responsive gene in Braya humilis

Wang

Zhao

et al. 2016

Acta Soc Bot Pol

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Braya humilis (Brassicaceae) is a widely distributed plant in arid and semi-arid regions of northern Asia. This plant is well adapted to extremely arid conditions and is a promising candidate species to discover novel drought tolerance strategies. However, not much information about the mechanism(s) mediating drought resistance in this species is currently available. Therefore, the present study aimed to characterize the physiological traits and expression patterns of a polyethylene glycol (PEG)-responsive gene in B. humilis responding to different levels of osmotic stress induced by PEG-6000. Several important physiological parameters were examined, including the levels of relative water content, soluble protein, malondialdehyde, and antioxidant enzyme activity. A tolerance threshold between 20 and 30% PEG-6000 was identified for B. humilis. The water status and oxidative damage below this threshold were maintained at a relatively constant level during the 12 h of treatment. However, once the threshold was exceeded, the water status and oxidative damage were obviously affected after treatment for 4 h. The soluble protein results suggest that B. humilis maintains a vigorous resistance to osmotic stress and that it may play a greater role in osmotic regulation at late stages of stress. Moreover, superoxide dismutase and catalase may be important at preventing oxidative damage in plants at early stages of stress, while peroxidase may be more involved in some biological processes that resist osmotic stress at the late stage, especially in severely damaged plants. Furthermore, a PEG-responsive gene, BhCIPK12, was identified by differential display reverse transcription-polymerase chain reaction (PCR), cloned, and characterized by quantitative real-time PCR. We hypothesized that this gene may play an important role in mediating osmotic stress or drought resistance in plants. Altogether, these results provide valuable insights into the mechanism(s) mediating drought tolerance in B. humilis.

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Antioxidant Enzymes and Photosynthetic Responses to Drought Stress of Three Canna edulis Cultivars

Cited by 5 publications

References 48 publications

Different responses of photosystem and antioxidant defense system to three environmental stresses in wheat seedlings

Different responses of photosystem and antioxidant defense system to three environmental stresses in wheat seedlings

Pangenomes as a Resource to Accelerate Breeding of Under-Utilised Crop Species

Physiological adaptations to osmotic stress and characterization of a polyethylene glycol-responsive gene in Braya humilis

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