Cellular Responses, Osmotic Adjustments, and Role of Osmolytes in Providing Salt Stress Resilience in Higher Plants: Polyamines and Nitric Oxide Crosstalk

Choudhary, Sadaf; Wani, Kaiser Iqbal; Naeem, M.; Khan, M. Masroor A.; Aftab, Tariq

doi:10.1007/s00344-022-10584-7

Cited by 62 publications

(30 citation statements)

References 151 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…NO production could be mediated by H 2 O 2 as the result of PAs oxidation by DAO and PAO or by other unknown mechanisms that could be related to the PAs pathway [ 33 ]. The positive regulatory role of NO in the increase of the expression of genes involved in PA biosynthesis and the decrease of PAO enzyme activity was previously reviewed, confirming the role of NO in PA homeostasis [ 34 ]. It should also be noted that H 2 S, an endogenous gas transmitter, could also play a negative and positive role in plants, acting as a toxic intermediate of cellular metabolism or as a signaling molecule, respectively [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 77%

Putrescine: A Key Metabolite Involved in Plant Development, Tolerance and Resistance Responses to Stress

González-Hernández

Scalschi

Vicedo

et al. 2022

IJMS

View full text Add to dashboard Cite

Putrescine (Put) is the starting point of the polyamines (PAs) pathway and the most common PA in higher plants. It is synthesized by two main pathways (from ornithine and arginine), but recently a third pathway from citrulline was reported in sesame plants. There is strong evidence that Put may play a crucial role not only in plant growth and development but also in the tolerance responses to the major stresses affecting crop production. The main strategies to investigate the involvement of PA in plant systems are based on the application of competitive inhibitors, exogenous PAs treatments, and the most efficient approaches based on mutant and transgenic plants. Thus, in this article, the recent advances in understanding the role of this metabolite in plant growth promotion and protection against abiotic and biotic stresses will be discussed to provide an overview for future research.

show abstract

Section: Introductionmentioning

confidence: 77%

Putrescine: A Key Metabolite Involved in Plant Development, Tolerance and Resistance Responses to Stress

González-Hernández

Scalschi

Vicedo

et al. 2022

IJMS

View full text Add to dashboard Cite

show abstract

“…Many studies have also obtained similar results and reported that the PA-induced better water balance is due to decreasing the stomatal conductance and increasing proline, anthocyanins, and soluble phenolics levels, improving membrane properties and enhancing the activity of catalase and superoxide dismutase ( Farooq et al, 2009 ; Hassan et al, 2018 ). Their application has also been described as improving plant osmotic adjustment mechanisms ( Choudhary et al, 2022 ). However, the improvement in the water balance did not influence the plant biomass but instead reduced it in the PA-treated plants ( Figure 3 ).…”

Section: Discussionmentioning

confidence: 99%

Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario

et al. 2022

View full text Add to dashboard Cite

Biostimulants have become an asset for agriculture since they are a greener alternative to traditionally used plant protection products. Also, they have gained the farmers’ acceptance due to their effect on enhancing the plant’s natural defense system against abiotic stresses. Besides commercially available complex products, small molecule-based biostimulants are useful for industry and research. Among them, polyamines (PAs) are well-studied natural compounds that can elicit numerous positive responses in drought-stressed plants. However, the studies are merely focused on the vegetative development of the plant. Therefore, we aimed to evaluate how drenching with putrescine (Put) and spermidine (Spd) modified the maize production and the yield quality parameters. First, a dosage optimization was performed, and then the best PA concentrations were applied by drenching the maize plants grown under well-watered (WW) conditions or water deficit (WD). Different mechanisms of action were observed for Put and Spd regarding maize production, including when both PAs similarly improved the water balance of the plants. The application of Put enhanced the quality and quantity of the yield under WW and Spd under WD. Regarding the nutritional quality of the grains, both PAs increased the carbohydrates content, whereas the contribution to the protein content changed by the interaction between compound and growth conditions. The mineral content of the grains was also greatly affected by the water condition and the PA application, with the most relevant results observed when Spd was applied, ending with flour richer in Zn, Cu, and Ca minerals that are considered important for human health. We showed that the exogenous PA application could be a highly efficient biofortification approach. Our findings open a new exciting use to be studied deep in the biostimulant research.

show abstract

“…As soil moisture decreases, OA promotes turgor stability and, as a result, metabolic activity fidelity. By prolonging leaf folding and leaf tissue death, osmotic correction promotes agricultural production [59]. The efficient leaf area for photosynthesis rises as leaf curling and ageing decrease.…”

Section: Osmotic Adjustment Dehydration Tolerance and Transpiration E...mentioning

confidence: 99%

“…Although hydroxyl radicals are the most harmful of all active oxygen species, no enzyme has been discovered that can breakdown them. Compatible solutes, such as proline, citrulline, and mannitol, operate as scavengers of hydroxyl radicals and may limit contact between these ions and cellular constituents by substituting the water particles around these elements, preventing instability during drought [59]. For instance, betaine and proline protect RuBisCO, while betaine stabilises the PSII super complex.…”

Section: Accumulation Of Compatible Solutesmentioning

confidence: 99%

Sorghum Physiology and Adaptation to Abiotic Stresses

Behera

Saharia

Borah

et al. 2022

IJECC

View full text Add to dashboard Cite

Sorghum (Sorghum bicolor (L.) Moench) is the world's fifth most important cereal and a staple crop for nations in Sub-Saharan Africa and Asia, with great biomass production potential. In the dry and semi-arid tropics, it may be considered as a source of human food, grain, and pasture for cattle, as well as fuel. Abiotic stress factors such as drought, warmth, salt, and submergence remain key limitations to crop growth and yield as a result of climate change. Although sorghum can resist a variety of conditions such as heat, drought, salt, and floods, in dry and semi-arid areas, this crop is typically damaged by water stress at the post-flowering stage. Drought tolerance is a result of morphological and anatomical characteristics (thick leaf wax, leaf rolling, deep root system, and kranz anatomy), as well as physiological responses such as osmotic adjustment via osmoprotectants, stay green traits, quiescence, and ROS-scavenging enzymes such as catalases (CAT), superoxide dismutase (SOD), peroxidases (POD), and ascorbate peroxida (APX). Drought resistance is enhanced by functional proteins such as aquaporin, late embryogenesis abundant (LEA) proteins, heat shock protein, and regulatory proteins such as protein kinase, various transcription factors such as DREB2, bZIP, and phytohormones such as ABA and ethylene. Drought-tolerant sorghum genotypes contain greater osmolyte, chlorophyll, RWC decrease, leaf rolling, and up-regulation of various enzymes and regulatory proteins. When breeding for drought resistance, it's crucial to understand the various drought tolerance mechanisms in plants. The key to generating abiotic stress-tolerant agricultural plants in the future is to understand the physiological underpinning of crop production, crop responses, and crop adaptability in stress-prone locations under sustainable agriculture.

show abstract

Cellular Responses, Osmotic Adjustments, and Role of Osmolytes in Providing Salt Stress Resilience in Higher Plants: Polyamines and Nitric Oxide Crosstalk

Cited by 62 publications

References 151 publications

Putrescine: A Key Metabolite Involved in Plant Development, Tolerance and Resistance Responses to Stress

Putrescine: A Key Metabolite Involved in Plant Development, Tolerance and Resistance Responses to Stress

Addressing the contribution of small molecule-based biostimulants to the biofortification of maize in a water restriction scenario

Sorghum Physiology and Adaptation to Abiotic Stresses

Contact Info

Product

Resources

About