Differential response of quinoa genotypes to drought and foliage-applied H2O2 in relation to oxidative damage, osmotic adjustment and antioxidant capacity

Iqbal, Hassan; Chen, Yaning; Waqas, Muhammad; Shareef, Muhammad; Raza, Syed Turab

doi:10.1016/j.ecoenv.2018.08.004

Cited by 62 publications

(86 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…soluble sugar, protein and proline) generally increased with increasing salt levels for each studied cultivar (Fig. 5a-c), which was also widely reported in some quinoa genotypes in response to drought and salt stress [23,36]. Accumulation of soluble sugars and other compatible solutes (e.g.…”

Section: Accumulation Of Organic Osmolytes May Be Adaptivesupporting

confidence: 80%

See 1 more Smart Citation

Comparative physiological and biochemical mechanisms of salt tolerance in five contrasting highland quinoa cultivars

Cai

Gao

2020

BMC Plant Biol

View full text Add to dashboard Cite

Background: Chenopodium quinoa Willd., a halophytic crop, shows great variability among different genotypes in response to salt. To investigate the salinity tolerance mechanisms, five contrasting quinoa cultivars belonging to highland ecotype were compared for their seed germination (under 0, 100 and 400 mM NaCl) and seedling's responses under five salinity levels (0, 100, 200, 300 and 400 mM NaCl).Results: Substantial variations were found in plant size (biomass) and overall salinity tolerance (plant biomass in salt treatment as % of control) among the different quinoa cultivars. Plant salinity tolerance was negatively associated with plant size, especially at lower salinity levels (< 300 mM NaCl), but salt tolerance between seed germination and seedling growth was not closely correlated. Except for shoot/root ratio, all measured plant traits responded to salt in a genotype-specific way. Salt stress resulted in decreased plant height, leaf area, root length, and root/shoot ratio in each cultivar. With increasing salinity levels, leaf superoxide dismutase (SOD) activity and lipid peroxidation generally increased, but catalase (CAT) and peroxidase (POD) activities showed non-linear patterns. Organic solutes (soluble sugar, proline and protein) accumulated in leaves, whereas inorganic ion (Na + and K + ) increased but K + / Na + decreased in both leaves and roots. Across different salinity levels and cultivars, without close relationships with antioxidant enzyme activities (SOD, POD, or CAT), salinity tolerance was significantly negatively correlated with organic solute and malondialdehyde contents in leaves and inorganic ion contents in leaves or roots (except for root K + content), but positively correlated with K + /Na + ratio in leaves or roots. Conclusion:Our results indicate that leaf osmoregulation, K + retention, Na + exclusion, and ion homeostasis are the main physiological mechanisms conferring salinity tolerance of these cultivars, rather than the regulations of leaf antioxidative ability. As an index of salinity tolerance, K + /Na + ratio in leaves or roots can be used for the selective breeding of highland quinoa cultivars.

show abstract

Section: Accumulation Of Organic Osmolytes May Be Adaptivesupporting

confidence: 80%

“…The K + /Na + ratio in leaves or roots was positively correlated with salinity tolerance (Fig. 8c), which was also found in drought resistant quinoa [36] and, commonly, in glycophytes [1]. Thus, maintenance of ion homeostasis is critical for salt tolerance of our studied highland quinoa plants.…”

Section: Accumulation Of Organic Osmolytes May Be Adaptivesupporting

confidence: 60%

Comparative physiological and biochemical mechanisms of salt tolerance in five contrasting highland quinoa cultivars

Cai

Gao

2020

BMC Plant Biol

View full text Add to dashboard Cite

show abstract

“…As an example, the socalled 'cash crop halophytes' can be cultivated sustainably on dry and/or saline soils under seawater irrigation and can be used for food, fodder, combating soil erosion and various other purposes (Abdelly et al 2006(Abdelly et al , 2011, known as a halophyte plant, Chenopodium quinoa could be used as a potential alternative crop for salt-affected areas (Jacobsen et al 2003;Jacobsen 2014;Ruiz et al 2014;Zurita-Silva et al 2014). Quinoa has been recognized as a climate resilient crop of great value and there is an increasing effort to introduce it in different marginal agriculture production systems (Bertero et al 2004;Iqbal et al 2018). Moreover, its suitability for biosaline agriculture is based on the number of different subspecies, varieties and landraces and its ability to adapt different environments (Karyotis et al 2003;Shabala et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Physiological and biochemical markers for screening salt tolerant quinoa genotypes at early seedling stage

Derbali

Goussi

Koyro

et al. 2020

Journal of Plant Interactions

View full text Add to dashboard Cite

The present study was conducted to determine the predictive screening parameters of quinoa salt tolerance that can be applied at early development stages, based on physiological and biochemical approaches. Four quinoa varieties (Tumeko, Red Faro, Kcoito and UDEC-5) were cultivated using hydroponic system, and treated for 2 weeks with different NaCl concentrations (0, 100, 300 and 500 mM). Salt treatment induced a decrease of plant growth depending on NaCl concentrations, plant organs and varieties. Red Faro and UDEC-5 exhibited low level of Na + accumulation and high K/Na selectivity. UDEC-5 showed high stomatal conductance leading to high net photosynthesis, even at 500 mM NaCl. Red Faro and UDEC-5 exhibited low level of lipid peroxidation, high antioxidant activities and high proline accumulation, as an indicator of ROS defense and osmotic adjustment. This study suggested that these physiological and biochemical traits could be used as screening criteria for selecting salt tolerant genotype. ARTICLE HISTORY

show abstract

“…Jaleel et al [32] state that the increased activity of this enzyme occurs because it is the main enzyme to catalyze H 2 O 2 elimination. Iqbal et al [33] infer that CAT is one of the most effective enzymes in the defense against oxidative processes. Thus, high enzyme activities in corn plants under stress conditions represent better acclimatization capacity of the species.…”

Section: Discussionmentioning

confidence: 99%

Biochemical parameters and physiological changes in maize plants submitted to water deficiency

et al. 2020

View full text Add to dashboard Cite

This study presents the main changes that occur in the metabolism of corn plants submitted to water deficiency, which can directly affect the development and production of the plants. The aim of this study was to evaluate the biochemical and physiological metabolism responses in maize plants submitted to water deficiency. The experimental design was a randomized block in factorial scheme (3 × 3), being three irrigation depths and three evaluation periods with four replications. The treatments simulated two levels of water deficiency and one control: T1 (control treatment) 10-20 kPa; T2 (moderate water deficiency) 50-60 kPa, and T3 (severe water deficiency) 70-80 kPa. The evaluation periods were E1-45 days after emergence (DAE); E2-52 DAE; and E3-59 DAE. The variables analyzed were relative water content; electrolyte leakage; total soluble proteins; nitrate reductase activity; and activity of the antioxidative response system, namely superoxide dismutase, catalase, and peroxidase. The results showed that stress caused a decrease in the relative water content, reflecting changes in membrane permeability and possible induction of electrolyte losses and an increase in the activities of the enzymes of the antioxidative response system. Thus, corn plants submitted to water deficiency presented interactive responses as a strategy to mitigate the impact of stress.

show abstract

Differential response of quinoa genotypes to drought and foliage-applied H2O2 in relation to oxidative damage, osmotic adjustment and antioxidant capacity

Cited by 62 publications

References 59 publications

Comparative physiological and biochemical mechanisms of salt tolerance in five contrasting highland quinoa cultivars

Comparative physiological and biochemical mechanisms of salt tolerance in five contrasting highland quinoa cultivars

Physiological and biochemical markers for screening salt tolerant quinoa genotypes at early seedling stage

Biochemical parameters and physiological changes in maize plants submitted to water deficiency

Contact Info

Product

Resources

About