Heat Stress Decreases Levels of Nutrient-Uptake and -Assimilation Proteins in Tomato Roots

Giri, Anju; Heckathorn, Scott A.; Mishra, Sasmita; Krause, C. R.

doi:10.3390/plants6010006

Cited by 141 publications

(136 citation statements)

References 39 publications

(66 reference statements)

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“…S1) suggests the diminishing of antagonistic interactions ( i.e ., Zn‐P and Zn‐Fe antagonisms) by supra‐optimal growth temperature. In line with our findings, chronic or abrupt heat stress commonly reduced shoot mineral nutrient concentrations in many other crop species due to a range of physiological and morphological disorders including reduced root growth, synthesis and root‐to‐shoot transport of plant hormones, disrupted source‐sink relations, decreased levels of nutrient‐uptake and ‐assimilation proteins or direct damage of heat on root cells ( Huang et al., ; Heckathorn et al., ; Giri et al., ).…”

Section: Discussionsupporting

confidence: 89%

Supra‐optimal growth temperature exacerbates adverse effects of low Zn supply in wheat

Rehman

Farooq

Asif

et al. 2019

J. Plant Nutr. Soil Sci.

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Rising temperatures are a major threat to global wheat production, particularly when accompanied by other abiotic stressors such as mineral nutrient deficiencies. This study aimed to quantify the effects of supra‐optimal temperature on growth, photosynthetic performance, and antioxidative responses in bread wheat cultivars grown under varied zinc (Zn) supply. Two bread wheat cultivars (Triticum aestivum L., cvs. Lasani‐2008 and Faisalabad‐2008) with varied responsiveness to Zn supply and drought tolerance were cultured in nutrient solution with low (0.1 µM) or adequate (1.0 µM) Zn under optimal (25/20°C day/night) or supra‐optimal (36/28°C day/night) temperature regimes. Supra‐optimal temperature severely reduced root but not shoot biomass, whereas low Zn reduced shoot as well as root biomass. Shoot‐to‐root biomass ratio was reduced under low Zn but increased under supra‐optimal temperature. Supra‐optimal temperature inhibited root elongation and volume particularly in plants supplied with low Zn. In both cultivars, Zn efficiency index was reduced by supra‐optimal temperature, whereas heat tolerance index was reduced by low Zn supply. Supra‐optimal temperature decreased photosynthesis, quantum yield, and chlorophyll density in low‐Zn but not in adequate‐Zn plants. In comparison, low Zn decreased specific activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX) and increased glutathione reductase (GR), where supra‐optimal temperature increased SOD, decreased GR and did not change APX activity in leaves and roots. Moreover, supra‐optimal temperature severely reduced shoot Zn concentration and Zn uptake per plant specifically under adequate Zn supply. Overall, supra‐optimal temperature exacerbated adverse effects of low Zn supply, resulting in severe reductions in growth traits viz. shoot and root biomass, root length and volume, and consequently impeded Zn uptake, enhanced oxidative stress and impaired photosynthetic performance. Adequate Zn nutrition is crucial to prevent yield loss in wheat cultivated under supra‐optimal temperatures.

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Section: Discussionsupporting

confidence: 89%

Supra‐optimal growth temperature exacerbates adverse effects of low Zn supply in wheat

Rehman

Farooq

Asif

et al. 2019

J. Plant Nutr. Soil Sci.

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“…A significant reduction in vital minerals such as K, Ca, Fe, P, Mn, and Zn was noticed with in heat and/or drought‐stressed lentil plants, which might be attributed to reduction in root biomass and number in case of heat stress (Giri, Heckathorn, Mishra, & Krause, ), and impaired trasnpiration, stomatal conductance, decreased root function in case of drought stress (Farooq, Wahid, Kobayashi, Fujita, & Basra, ). These impacts intensified in the presence of both the stresses at the same time, which severely decreased the leaf water relations to inhbit the trasnlcoation of minerals into the developing seeds.…”

Section: Discussionmentioning

confidence: 99%

Influence of drought and heat stress, applied independently or in combination during seed development, on qualitative and quantitative aspects of seeds of lentil (Lens culinarisMedikus) genotypes, differing in drought sensitivity

Sehgal

Sita

Bhandari

et al. 2018

Plant Cell & Environment

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Terminal droughts, along with high temperatures, are becoming more frequent to strongly influence the seed development in cool-season pulses like lentil. In the present study, the lentil plants growing outdoors under natural environment were subjected to following treatments at the time of seed filling till maturity: (a) 28/23 °C day/night temperature as controls; (b) drought stressed, plants maintained at 50% field capacity, under the same growth conditions as in a; (c) heat stressed, 33/28 °C day/night temperature, under the same growth conditions as in a; and (d) drought + heat stressed, plants at 50% field capacity, 33/28 °C day/night temperature, under the same growth conditions as in (a). Both heat and drought resulted in marked reduction in the rate and duration of seed filling to decrease the final seed size; drought resulted in more damage than heat stress; combined stresses accentuated the damage to seed starch, storage proteins and their fractions, minerals, and several amino acids. Comparison of a drought-tolerant and a drought-sensitive genotype indicated the former type showed significantly less damage to various components of seeds, under drought as well as heat stress suggesting a cross tolerance, which was linked to its (drought tolerant) better capacity to retain more water in leaves and hence more photo-assimilation ability, compared with drought-sensitive genotype.

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“…As several prior laboratory-based studies showed, the HW effect was first noticed at the cellular level, which resulted in a decrease in photosynthetic enzyme activity and low stomatal conductance and had effects on other eco-physiological characteristics Zinta et al, 2014). Recent findings have confirmed that HWs significantly alter plant photosynthesis and respiration (Qu, Chen, Bunce, Zhu, & Sicher, 2018;Rashid et al, 2018), reduce CO 2 uptake (Tatarinov et al, 2016), and lead to the redistribution of carbon and nitrogen in a plant or community (Birami et al, 2018;Giri, Heckathorn, Mishra, & Krause, 2017). Here, mowing had a similar effect on the community but directly removed plant parts (photosynthetic product) rather than reducing the accumulation rate.…”

Section: Hws and Mowing Prolong Plant Phenologymentioning

confidence: 97%

Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment

Dong

Boeck

et al. 2019

Land Degrad Dev

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The frequency and intensity of heat waves (HWs) have increased in recent years, but it remains unclear how grassland ecosystems respond to such extreme weather. A 3‐year manipulative field experiment was conducted to simulate HWs under different mowing intensities in a Stipa krylovii steppe on the Mongolian Plateau to examine their effects on plant morphology, phenology, and community. At the species level, the morphology and phenology of the three main herb species (S. krylovii, Melilotoides ruthenica, and Potentilla tanacetifolia) showed species‐specific responses to the HW and mowing treatments. The major dominant species S. krylovii shed ~50% of the tiller outer layer to protect the internal tiller from HW stress thereby directly decreasing the heat load and water loss from green plant tissue and indirectly increasing the litter biomass. HWs also caused increases of community index (richness, diversity, and evenness) but also associated with a 30% decrease in the importance value of S. krylovii, whereas mowing enhanced this value by 27%. When HWs were combined with mowing, the joint forcing of mechanical damage and low carbon accumulation aggravated negative effects of stress on plant health and growth, which further decreased community index. We constructed a framework to fully describe the effects of HWs and mowing and their interrelationship on different ecological levels and explain how short‐term effects, such as extreme climate, produce long‐term effects on ecosystems. In conclusion, we found that synergisms between climate extremes (HWs) and human activities (mowing) can reduce ecosystem stability posing a threat to the grasslands.

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Heat Stress Decreases Levels of Nutrient-Uptake and -Assimilation Proteins in Tomato Roots

Cited by 141 publications

References 39 publications

Supra‐optimal growth temperature exacerbates adverse effects of low Zn supply in wheat

Supra‐optimal growth temperature exacerbates adverse effects of low Zn supply in wheat

Influence of drought and heat stress, applied independently or in combination during seed development, on qualitative and quantitative aspects of seeds of lentil (Lens culinarisMedikus) genotypes, differing in drought sensitivity

Joint forcing by heat waves and mowing poses a threat to grassland ecosystems: Evidence from a manipulative experiment

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