Approaches in modulating proline metabolism in plants for salt and drought stress tolerance: Phytohormones, mineral nutrients and transgenics

Per, Tasir S.; Khan, Nafees A.; Reddy, Palakolanu Sudhakar; Masood, Asim; Hasanuzzaman, Mirza; Khan, M. Iqbal R.; Anjum, Naser A.

doi:10.1016/j.plaphy.2017.03.018

Cited by 362 publications

(194 citation statements)

References 157 publications

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“…Another study with 100 sainfoin genotypes from 10 ecotypes showed that drought tolerance was, however, correlated with leaf proline content (Irani et al, 2015). Additionally, there is some indication that it might contribute to upregulation of drought tolerance genes (Szabados and Savouré, 2010;Per et al, 2017). Additionally, there is some indication that it might contribute to upregulation of drought tolerance genes (Szabados and Savouré, 2010;Per et al, 2017).…”

Section: Effects Of Drought On Yield and Condensed Tannin Content In mentioning

confidence: 99%

“…This correlation is in accordance with previous studies, and although the cause-and-effect relationship between proline and drought tolerance is not yet fully understood, proline can act as an osmoprotectant, thus stabilizing membranes and maintaining cell turgor. Additionally, there is some indication that it might contribute to upregulation of drought tolerance genes (Szabados and Savouré, 2010;Per et al, 2017). Therefore, the current understanding of CT expression in sainfoin suggests that it should be possible to breed new cultivars with good yields, drought tolerance, and consistent CT profiles, which is important, as farmers need forage legumes with predictable CT traits.…”

Section: Effects Of Drought On Yield and Condensed Tannin Content In mentioning

confidence: 99%

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Benefits of Condensed Tannins in Forage Legumes Fed to Ruminants: Importance of Structure, Concentration, and Diet Composition

et al. 2019

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Condensed tannins (CTs) account for up to 20% of the dry matter in forage legumes used as ruminant feeds. Beneficial animal responses to CTs have included improved growth, milk and wool production, fertility, and reduced methane emissions and ammonia volatilization from dung or urine. Most important is the ability of such forages to combat the effects of gastrointestinal parasitic nematodes. Inconsistent animal responses to CTs were initially attributed to concentration in the diet, but recent research has highlighted the importance of their molecular structures, as well as concentration, and also the composition of the diet containing the CTs. The importance of CT structural traits cannot be underestimated. Interdisciplinary research is the key to unraveling the relationships between CT traits and bioactivities and will enable future on‐farm exploitation of these natural plant compounds. Research is also needed to provide plant breeders with guidelines and screening tools to optimize CT traits, in both the forage and the whole diet. In addition, improvements are needed in the competitiveness and agronomic traits of CT‐containing legumes and our understanding of options for their inclusion in ruminant diets. Farmers need varieties that are competitive in mixed swards and have predictable bioactivities. This review covers recent results from multidisciplinary research on sainfoin (Onobrychis Mill. spp.) and provides an overview of current developments with several other tanniniferous forages. Tannin chemistry is now being linked with agronomy, plant breeding, animal nutrition, and parasitology. The past decade has yielded considerable progress but also generated more questions—an enviable consequence of new knowledge!

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Section: Effects Of Drought On Yield and Condensed Tannin Content In mentioning

confidence: 99%

Section: Effects Of Drought On Yield and Condensed Tannin Content In mentioning

confidence: 99%

Benefits of Condensed Tannins in Forage Legumes Fed to Ruminants: Importance of Structure, Concentration, and Diet Composition

et al. 2019

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“…Salinity adversely affects important physiological processes and biochemical mechanisms, causes severe loss in crop productivity worldwide (Per et al, 2017) and can cause some biochemical changes in plant cell such as losing of cell turgor and the accumulation of reactive oxygen species (ROS) (Nxele et al, 2017). Reactive oxygen species (ROS) including hydrogen peroxide (H 2 O 2 ), superoxide anions (O 2 •−), hydroxyl radical (OH•) and singlet oxygen ( 1 O 2 ) are by-products of physiological metabolisms, and are precisely controlled by enzymatic and non-enzymatic antioxidant defense systems (You and Chan, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…One of the other cellular responses to saline conditions is the alteration of metabolism and production of compatible solutes (osmolytes) such as proline, which are distributed among different organisms (Mansour and Ali, 2017). The accumulation of proline (Pro) is one of the striking metabolic responses of plants to salt stress (Per et al, 2017). One of the cell parts where stress-related oxidative damage has the most effect is the cell membrane.…”

Section: Introductionmentioning

confidence: 99%

Morphological and biochemical changes in response to salinity in sunflower (Helianthus annus L.) cultivars

et al. 2018

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This study was conducted to evaluate the alterations of some morphological and biochemical parameters of sunflower cultivars ('08-TR-003', 'TR-3080' and 'TARSAN-1018') under salt stress. For this aim, the seedling of sunflower cultivars was irrigated with tap water as a control, and with salinized water with 50, 150 and 250 mM NaCl for 30 days under controlled conditions. Salinity caused an apparent reduction in morphological parameters (plant height, leaf area, fresh weight, dry matter and water content) in all cultivars. Salt stress significantly (P<0.01) reduced the activity of glutathione reductase (GR) and ascorbate peroxidase (APX) activities in all sunflower cultivars expect for superoxide dismutase (SOD) activity. According to our results, SOD seems to play a key role in the antioxidative process in salt treated sunflower plants. Proline and MDA contents were significantly (P<0.05) increased under salt stress in all cultivars. Among the cultivars, 'TR-3080' had greater values in terms of morphological (plant height, leaf area, fresh weight, water content) and biochemical (GR, APX and SOD (secondly) activities and proline contents) parameters. In the light of these findings, cv. 'TR-3080' seems to be less affected by salt stress.

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“…However, to adapt to water stress, plants have evolved many acclimation mechanisms, including osmotic adjustment and antioxidant defense systems, which may enhance their ability to grow and develop under drought conditions (Fu and Huang, 2001; Khaleghi et al, 2019). Under water stress conditions, soluble sugars and proline accumulate to serve as osmolytes in various plants, assist in membrane protein stabilization, and ultimately increase plant resistance against water stress (Ashraf and Foolad, 2007; Gomes et al, 2010; Per et al, 2017). Further, ROS scavenging enzymatic antioxidants, such as superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), glutathione reductase (GR), and ascorbate peroxidase (APX) can be activated to clear these excessive ROS (Gill and Tuteja, 2010).…”

Section: Introductionmentioning

confidence: 99%

Response patterns and mechanisms of plants to water stress

Ruan

Sun

Wang

et al. 2020

Preprint

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8Abbreviations: ABA, abscisic acid; APX, ascorbate peroxidase; AsA, ascorbate; Car, 9 carotenoid; CAT, catalase; Chl, chlorophyll; EA, enzymatic antioxidants; EL, 10 electrolyte leakage; Fv/Fm, maximal efficiency of PSII photochemistry; GR, 11 glutathione reductase; MDA, malondialdehyde; NEA, non-enzymatic antioxidants; 12 PMP, plasma membrane permeability; POD, peroxidase; PS, photosynthesis; qP, 13 photochemical quenching coefficient; ROS, reactive oxygen species; SD, standard 14 deviation; SOD, superoxide dismutase. 15One senence summary: The overproduction of ROS was the primary mechanism of 16 plants in response to water stress and that plants tend to acclimate to water stress over Abstract 29 Plants are key to the functionality of many ecosystem processes. The duration and 30 intensity of water stress are anticipated to increase in the future; however, an 31 elucidation of the responses of plants to water stress remains incomplete. For this 32 study, we present a global meta-analysis derived from 1301 paired observations from 33 84 studies to evaluate the response patterns and mechanisms of plants to water stress. 34 The results revealed that while water stress inhibited plant growth and photosynthesis, 35 reactive oxygen species (ROS), plasma membrane permeability, enzymatic 36 antioxidants, and non-enzymatic antioxidants increased. These responses generally 37 increased with the intensity of water stress but were mitigated with experimental 38 duration. Our findings suggested that the overproduction of ROS was the primary 39 mechanism of plants in response to water stress and that plants tend to acclimate to 40 water stress over time to some extent. Our synthesis provides a framework for 41 understanding the responses and mechanisms of plants under drought conditions. 42 KEYWORDS 43 Water stress, plants, meta-analysis, reactive oxygen species, drought adaption 44 48 required for photosynthesis due to stomatal closure and reduced internal water 49 transport (Breda et al., 2006). As such, water stress impairs normal plant functionality 50 and further induces morphological, physiological, and biochemical changes to 51 compensate for water limitations (Mitchell et al., 2013; Lee et al., 2016). 52 Understanding the patterns and mechanisms of responses by plants to water stress is 53 central to predicting future plant functionality and resilience to drought episodes. 54 The impacts of water stress on plant growth, physiology, and biochemistry are 55 well documented, and numerous individual studies have examined the roles of plant 56 physiological indexes as relates to their tolerance to water stress (van der Molen et al., 57 2011; Zwicke et al., 2015). For plants, water limitations lead to the overproduction of 58 reactive oxygen species (ROS), such as hydrogen peroxide (H 2 O 2 ), and superoxide 59 anion radical (O 2̄· ), which results in growth inhibition (Wallace et al., 2016), 60 decreases in photosynthetic functions (Deeba et al., 2012), lipid peroxidation, and 61 further programmed cell death pro...

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Approaches in modulating proline metabolism in plants for salt and drought stress tolerance: Phytohormones, mineral nutrients and transgenics

Cited by 362 publications

References 157 publications

Benefits of Condensed Tannins in Forage Legumes Fed to Ruminants: Importance of Structure, Concentration, and Diet Composition

Benefits of Condensed Tannins in Forage Legumes Fed to Ruminants: Importance of Structure, Concentration, and Diet Composition

Morphological and biochemical changes in response to salinity in sunflower (Helianthus annus L.) cultivars

Response patterns and mechanisms of plants to water stress

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