Toward Understanding the Regulation of Photosynthesis under Abiotic Stresses: Recent Developments

Hussain, Syed Sarfraz

doi:10.1002/9781119501800.ch8

Cited by 3 publications

(2 citation statements)

References 258 publications

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“…However, photosynthesis is highly sensitive to abiotic stresses. Abiotic stress inhibits photosynthesis to cope with osmotic changes in the plant (Hussain 2019). Abiotic stress leads to a reduction in the photosynthesis process by decreasing chlorophyll content (Khan et al 2020), stomatal conductance, and net photosynthetic rate (Feng et al 2009), also increasing ROS and suffering membrane integrity (Dubey et al 2021).…”

Section: Photosynthesis Changes In Betula Platyphylla Under Abiotic Stressesmentioning

confidence: 99%

“…Abiotic stresses are increasing, and only a few tree species can grow normally in such conditions. It is known that abiotic stresses, including cold, drought, osmotic, high salinity, UV-radiation, and heavy metals stress are hostile to plant growth and development, causing yield reduction (Hussain 2019) and worldwide economic losses (He et al 2018). As such, abiotic stress tolerance research in tree species is critical (Zhang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Abiotic stresses induced physiological, biochemical, and molecular changes in <i>Betula platyphylla</i>: a review

Ritonga¹,

Ngatia²,

Song³

et al. 2021

Silva Fenn.

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Abiotic stress is one of the major factors in reducing plant growth, development, and yield production by interfering with various physiological, biochemical, and molecular functions. In particular, abiotic stress such as salt, low temperature, heat, drought, UV-radiation, elevated CO2, ozone, and heavy metals stress is the most frequent study in Sukaczev. is one of the most valuable tree species in East Asia facing abiotic stress during its life cycle. Using transgenic plants is a powerful tool to increase the abiotic stress tolerance. Generally, abiotic stress reduces leaves water content, plant height, fresh and dry weight, and enhances shed leaves as well. In the physiological aspect, salt, heavy metal, and osmotic stress disturbs seed germination, stomatal conductance, chlorophyll content, and photosynthesis. In the biochemical aspect, salt, drought, cold, heat, osmotic, UV-B radiation, and heavy metal stress increases the ROS production of cells, resulting in the enhancement of enzymatic antioxidant (SOD and POD) and non-enzymatic antioxidant (proline and AsA) to reduce the ROS accumulation. Meanwhile, upregulates various genes, as well as proteins to participate in abiotic stress tolerance. Based on recent studies, several transcription factors contribute to increasing abiotic stress tolerance in , including , and . These transcription factors bind to different cis-acting elements to upregulate abiotic stress-related genes, resulting in the enhancement of salt, drought, cold, heat, osmotic, UV-B radiation, and heavy metal tolerance. These genes along with phytohormones mitigate the abiotic stress. This review also highlights the candidate genes from another Betulacea family member that might be contributing to increasing abiotic stress tolerance.Betula platyphyllaBetula platyphyllaB. platyphyllaB. platyphyllaB. platyphyllaB. platyphyllaBplMYB46, BpMYB102, BpERF13, BpERF2, BpHOX2, BpHMG6, BpHSP9, BpUVR8, BpBZR1, BplERD15BpNACsB. platyphylla

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Section: Photosynthesis Changes In Betula Platyphylla Under Abiotic Stressesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Abiotic stresses induced physiological, biochemical, and molecular changes in <i>Betula platyphylla</i>: a review

Ritonga¹,

Ngatia²,

Song³

et al. 2021

Silva Fenn.

View full text Add to dashboard Cite

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Engineered hypermutation adapts cyanobacterial photosynthesis to combined high light and high temperature stress

Sun

Luan

et al. 2023

Nat Commun

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Photosynthesis can be impaired by combined high light and high temperature (HLHT) stress. Obtaining HLHT tolerant photoautotrophs is laborious and time-consuming, and in most cases the underlying molecular mechanisms remain unclear. Here, we increase the mutation rates of cyanobacterium Synechococcus elongatus PCC 7942 by three orders of magnitude through combinatory perturbations of the genetic fidelity machinery and cultivation environment. Utilizing the hypermutation system, we isolate Synechococcus mutants with improved HLHT tolerance and identify genome mutations contributing to the adaptation process. A specific mutation located in the upstream non-coding region of the gene encoding a shikimate kinase results in enhanced expression of this gene. Overexpression of the shikimate kinase encoding gene in both Synechococcus and Synechocystis leads to improved HLHT tolerance. Transcriptome analysis indicates that the mutation remodels the photosynthetic chain and metabolism network in Synechococcus. Thus, mutations identified by the hypermutation system are useful for engineering cyanobacteria with improved HLHT tolerance.

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Chickpea plant responses to polyphosphate fertiliser forms and drip fertigation frequencies: effect on photosynthetic performance and phenotypic traits

et al. 2021

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Photosynthesis is the main biophysiological process that governs plant growth and development. Under nutrient deficiency in crops and soils, many photosynthetic reactions can be disturbed. We compared two polyphosphates (Poly-A and Poly-B) and an orthophosphate fertiliser (Ortho-P) to an unfertilised treatment under three drip fertigation frequencies. Results showed that the electron transport chain between PSII and PSI was significantly enhanced in fertigated chickpea plants compared with the control treatment. The polyphosphate fertiliser (Poly-A) enhanced the number of electron acceptors of the photosynthetic linear electron transport chain compared with the other fertiliser forms. Furthermore, the time for reaching the maximum intensity Fm was shortened in the fertilised chickpea plant indicating that the rate of light trapping and electron transport was enhanced under phosphorus drip fertigation. Also, the energy needed to close all reaction centres was decreased with P fertigated treatments, as revealed by the electron acceptor pool size of PSII (Sm/tFmax). However, no significant effects of fertiliser forms or fertigation frequencies were observed on the energetic demand for reaction centres closure. Plants grown under polyphosphate fertigation absorbed significantly more phosphorus. Positive correlations between phosphorus uptake, photosynthetic yield, chickpea podding dynamic, and grain yield showed the beneficial effects of adequate phosphorus nutrition on chickpea growth and productivity.

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Toward Understanding the Regulation of Photosynthesis under Abiotic Stresses: Recent Developments

Cited by 3 publications

References 258 publications

Abiotic stresses induced physiological, biochemical, and molecular changes in <i>Betula platyphylla</i>: a review

Abiotic stresses induced physiological, biochemical, and molecular changes in <i>Betula platyphylla</i>: a review

Engineered hypermutation adapts cyanobacterial photosynthesis to combined high light and high temperature stress

Chickpea plant responses to polyphosphate fertiliser forms and drip fertigation frequencies: effect on photosynthetic performance and phenotypic traits

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