Mitochondrial sense sHSP23.6 protein keeps photosynthetic electron transport during drought

Hüther, Cristina Moll; Borella, Júnior; Martinazzo, Emanuela Garbin; Dalberto, Davi Silva; Farias, Márcio Espinosa de; Posso, Douglas Antônio; Rombaldi, Cesar Valmor; Bacarin, Marcos Antônio

doi:10.1007/s40626-021-00232-y

Cited by 2 publications

(3 citation statements)

References 68 publications

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“…Small heat shock proteins (sHSPs) act as molecular chaperones, with key roles under many stresses. Hüther et al (2022) used mitochondrial sense sHSP23.6 (sense and antisense levels) to enhance the photosynthetic activity of ‘Micro‐Tom’ tomato (C3) under DS (water withheld for 5 days), reporting that the sense level improved chlorophyll index, energy generation, electron flow, interconnection between PSII and PSI, and DS tolerance. Their findings suggest that sHSP23.6 sensing enables plants to tolerate DS for longer than antisensing when photochemical reactions related to PSII are considered.…”

Section: Improving Photosynthesis Under Drought Stressmentioning

confidence: 99%

“…Thus, new techniques are urgently needed to mitigate the effect of DS on crop growth without compromising yield production. Photosynthetic efficiency, leaf photosynthesis, and carbon assimilation are the most important metabolic processes for regulating plant growth and development but are sensitive under environmental constraints, especially DS (Hüther et al, 2022; Jin et al, 2022; Pandey et al, 2022; Ullah et al, 2022). Inhibited photosynthesis is a primary physiological consequence of DS to stomatal closure (Anjum, Wang, Farooq, Xue, & Ali, 2011; Anjum, Wang, Farooq, Xue, & Hussain, 2011; Khalvandi et al, 2021), impaired photochemical apparatus (Pandey et al, 2022), chlorophyll degradation (Begum et al, 2022; Farooq, Nawaz, Chaudhry, Indrasti, et al, 2017, Farooq, Nawaz, Chaudhry, & Rehman, 2017) and reduced intercellular CO 2 (Han, Zhang, Du, et al, 2022; Ullah et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Plant photosynthetic responses under drought stress: Effects and management

Zahra

Hafeez

Kausar

et al. 2023

J Agronomy Crop Science

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Balanced photosynthesis is essential for improved plant survival and agricultural benefits in terms of biomass and yield. Photosynthesis is the hub of energy metabolism in plants; however, drought stress (DS) strongly perturbs photosynthetic efficiency due to biochemical and diffusive limitations that reduce key photosynthetic components and close stomata. This review describes photosynthetic responses, chloroplast retrograde signalling, and genetic imprints that curtail DS damage to photosynthetic machinery. While stomatal closure, disrupted photosynthetic systems, over‐reduced electron transport rates (ETR), partial hindrance of the Calvin cycle, and reduced pigment contents strongly affect the repertoire of photosynthetic processes under DS, chloroplast retrograde signalling also has a plausible role in preserving photosynthetic capacity. Progress in agronomic, genetic engineering approaches and isoprene regulation would help to rescue photosynthetic apparatus under DS.

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Section: Improving Photosynthesis Under Drought Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plant photosynthetic responses under drought stress: Effects and management

Zahra

Hafeez

Kausar

et al. 2023

J Agronomy Crop Science

View full text Add to dashboard Cite

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“…In addition, these plants had a better modulation of the antioxidant system and higher lycopene content in fruits when subjected to hypoxia and moderate water deficit [ 206 , 207 ]. More recently, the same research group compared the effects of drought imposed during flowering on the photosynthetic activities of MT wildtype plants and those exhibiting silenced or overexpressed sHSP23.6 [ 208 ]. The MT-sHSP23.6-overexpressing plants maintained their photosystem electron flow, energy generation, and chlorophyll index.…”

Section: Manipulating Mitochondrial Metabolism To Improve Plant Resis...mentioning

confidence: 99%

Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses

Barreto

Koltun

Nonato

et al. 2022

IJMS

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The interaction of mitochondria with cellular components evolved differently in plants and mammals; in plants, the organelle contains proteins such as ALTERNATIVE OXIDASES (AOXs), which, in conjunction with internal and external ALTERNATIVE NAD(P)H DEHYDROGENASES, allow canonical oxidative phosphorylation (OXPHOS) to be bypassed. Plant mitochondria also contain UNCOUPLING PROTEINS (UCPs) that bypass OXPHOS. Recent work revealed that OXPHOS bypass performed by AOXs and UCPs is linked with new mechanisms of mitochondrial retrograde signaling. AOX is functionally associated with the NO APICAL MERISTEM transcription factors, which mediate mitochondrial retrograde signaling, while UCP1 can regulate the plant oxygen-sensing mechanism via the PRT6 N-Degron. Here, we discuss the crosstalk or the independent action of AOXs and UCPs on mitochondrial retrograde signaling associated with abiotic stress responses. We also discuss how mitochondrial function and retrograde signaling mechanisms affect chloroplast function. Additionally, we discuss how mitochondrial inner membrane transporters can mediate mitochondrial communication with other organelles. Lastly, we review how mitochondrial metabolism can be used to improve crop resilience to environmental stresses. In this respect, we particularly focus on the contribution of Brazilian research groups to advances in the topic of mitochondrial metabolism and signaling.

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Mitochondrial sense sHSP23.6 protein keeps photosynthetic electron transport during drought

Cited by 2 publications

References 68 publications

Plant photosynthetic responses under drought stress: Effects and management

Plant photosynthetic responses under drought stress: Effects and management

Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses

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