Seed Priming with Phytohormones: An Effective Approach for the Mitigation of Abiotic Stress

Rhaman, Mohammad Saidur; Imran, Shahin; Rauf, Farjana; Khatun, Mousumi; Baskin, Carol C.; Murata, Yoshiyuki; Hasanuzzaman, Mirza

doi:10.3390/plants10010037

Cited by 170 publications

(93 citation statements)

References 132 publications

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“…In abiotic stress, SA modulates nutrient acquisition to assist with growth and development [ 98 ]. In addition to the acquisition of mineral nutrients, SA plays a role in ensuring membrane integrity and regulation of trans-membrane flow [ 99 ]. Sharma et al [ 100 ] had reported that SA played a crucial role in the uptake of elements such as Ca, Cu, Fe, Mn, P, and Zn.…”

Section: Mechanisms Regulating Sa-induced Stress-tolerancementioning

confidence: 99%

SA-Mediated Regulation and Control of Abiotic Stress Tolerance in Rice

Nadarajah

Hamid

Rahman

2021

IJMS

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Environmental or abiotic stresses are a common threat that remains a constant and common challenge to all plants. These threats whether singular or in combination can have devastating effects on plants. As a semiaquatic plant, rice succumbs to the same threats. Here we systematically look into the involvement of salicylic acid (SA) in the regulation of abiotic stress in rice. Studies have shown that the level of endogenous salicylic acid (SA) is high in rice compared to any other plant species. The reason behind this elevated level and the contribution of this molecule towards abiotic stress management and other underlying mechanisms remains poorly understood in rice. In this review we will address various abiotic stresses that affect the biochemistry and physiology of rice and the role played by SA in its regulation. Further, this review will elucidate the potential mechanisms that control SA-mediated stress tolerance in rice, leading to future prospects and direction for investigation.

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Section: Mechanisms Regulating Sa-induced Stress-tolerancementioning

confidence: 99%

SA-Mediated Regulation and Control of Abiotic Stress Tolerance in Rice

Nadarajah

Hamid

Rahman

2021

IJMS

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“…dicoccoides revealed the presence of ABA, indole acetic acid (IAA) and high levels of SA and jasmonic acid (JA) [ 22 ] (Raviv et al, 2018). These stored phytohormones might play a role in seed dormancy and germination as well as in seed priming and post germination growth [ 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Single and Combined Salinity and Heat Stresses Impact Yield and Dead Pericarp Priming Activity

Swetha

Singiri

Novoplansky

et al. 2021

Plants

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In the face of climate change and the predicted increase in the frequency and severity of abiotic stresses (e.g., hot spell, salinity), we sought to investigate the effect of salinity (S), short episodes of high temperature (HS) and combination of salinity and high temperature (SHS), at the reproductive phase, on yield with a special focus on the properties of dead pericarps of Brassica juncea. Three interval exposures to HS resulted in massive seed abortion, and seeds from salt-treated plants germinated poorly. Germination rate and final germination of B. juncea seeds were slightly reduced in the presence of salt and SHS pericarp extracts. All pericarp extracts completely inhibited seed germination of tomato and Arabidopsis, but removal of pericarp extracts almost fully restored seed germination. Heat and salinity profoundly affected the accumulation of phytohormones in dead pericarps. Combined stresses highly reduced IAA and ABA levels compared with salt, and enhanced the accumulation of GA1, but abolished the positive effect of salt on the accumulation of GA4, JA and SA. Interestingly, pericarp extracts displayed priming activity and significantly affected seedling performance in a manner dependent on the species and on the origin of the pericarp. While control pericarps improved and reduced the seedlings’ performance of autologous and heterologous species, respectively, pericarps from salt-treated plants were harmless or improved heterologous seedling performance. Thus, the strategy employed by the germinating seed for securing resources is set up, at least partly, by the mother plant in conjunction with the maternal environment whose components are stored in the dead maternal organs enclosing the embryo.

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“…Moreover, other signalling metabolites such as indole acetic acid (IAA) and salicylic acid (SA) were found increased in maize plants treated with HS compared to the control ( Figure 2 C). These phytohormones are regulatorily involved in various biochemical and physiological processes in plants, such as seed germination, seedling growth, stomatal aperture, respiration, and in interactions with the environment [ 19 , 20 ]. Thus, the measured changes in lipids and hormonal (signalling) networks in maize plants ( Figure 2 B,C) suggest that the HS biostimulants remodel maize metabolism towards growth promotion via the activation and enhancement of physiological events for improved plant development and the potentiation of defences [ 21 , 22 , 23 ].…”

Section: Resultsmentioning

confidence: 99%

A Metabolic Choreography of Maize Plants Treated with a Humic Substance-Based Biostimulant under Normal and Starved Conditions

et al. 2021

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Humic substance (HS)-based biostimulants show potentials as sustainable strategies for improved crop development and stress resilience. However, cellular and molecular mechanisms governing the agronomically observed effects of HS on plants remain enigmatic. Here, we report a global metabolic reprogramming of maize leaves induced by a humic biostimulant under normal and nutrient starvation conditions. This reconfiguration of the maize metabolism spanned chemical constellations, as revealed by molecular networking approaches. Plant growth and development under normal conditions were characterized by key differential metabolic changes such as increased levels of amino acids, oxylipins and the tricarboxylic acid (TCA) intermediate, isocitric acid. Furthermore, under starvation, the humic biostimulant significantly impacted pathways that are involved in stress-alleviating mechanisms such as redox homeostasis, strengthening of the plant cell wall, osmoregulation, energy production and membrane remodelling. Thus, this study reveals that the humic biostimulant induces a remodelling of inter-compartmental metabolic networks in maize, subsequently readjusting the plant physiology towards growth promotion and stress alleviation. Such insights contribute to ongoing efforts in elucidating modes of action of biostimulants, generating fundamental scientific knowledge that is necessary for development of the biostimulant industry, for sustainable food security.

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Seed Priming with Phytohormones: An Effective Approach for the Mitigation of Abiotic Stress

Cited by 170 publications

References 132 publications

SA-Mediated Regulation and Control of Abiotic Stress Tolerance in Rice

SA-Mediated Regulation and Control of Abiotic Stress Tolerance in Rice

Single and Combined Salinity and Heat Stresses Impact Yield and Dead Pericarp Priming Activity

A Metabolic Choreography of Maize Plants Treated with a Humic Substance-Based Biostimulant under Normal and Starved Conditions

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