Energy dissipation and antioxidant enzyme system protect photosystem II of sweet sorghum under drought stress

Guo, Yuanyuan; Tian, Shufei; Liu, S. S.; Wang, W. Q.; Sui, Na

doi:10.1007/s11099-017-0741-0

Cited by 119 publications

(69 citation statements)

References 64 publications

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“…Drought is an important factor limiting plant growth worldwide, inducing adverse reactions such as osmotic imbalance, membrane system damage, and decreased respiratory and photosynthetic rates. Drought not only hinders plant growth and metabolism at various stages but also affects crop quality and yields (Bartels and Sunkar, 2005;Liu et al, 2015a;Guo et al, 2018).…”

Section: Roles In Drought Stressmentioning

confidence: 99%

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

et al. 2020

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Abiotic stresses such as drought and salinity are major environmental factors that limit crop yields. Unraveling the molecular mechanisms underlying abiotic stress resistance is crucial for improving crop performance and increasing productivity under adverse environmental conditions. Zinc finger proteins, comprising one of the largest transcription factor families, are known for their finger-like structure and their ability to bind Zn 2+ . Zinc finger proteins are categorized into nine subfamilies based on their conserved Cys and His motifs, including the Cys2/His2-type (C2H2), C3H, C3HC4, C2HC5, C4HC3, C2HC, C4, C6, and C8 subfamilies. Over the past two decades, much progress has been made in understanding the roles of C2H2 zinc finger proteins in plant growth, development, and stress signal transduction. In this review, we focus on recent progress in elucidating the structures, functions, and classifications of plant C2H2 zinc finger proteins and their roles in abiotic stress responses. FIGURE 1 | Structure of C2H2 zinc finger proteins. Structural model of the Arabidopsis C2H2 zinc finger protein STZ produced using the Protein Model Portal tool. Han et al.

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Section: Roles In Drought Stressmentioning

confidence: 99%

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

et al. 2020

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“…The levels of lipid peroxidation were increased with the increasing of ROS accumulation under drought. The accumulation of H 2 O 2 also enhanced photo-inhibition of PSII and PSI (Figure 7) and inhibited or even damaged the PSII reaction centers [28]. The ROS molecules can be scavenged by various antioxidative defense mechanisms under common conditions [37].…”

Section: The Response Of Leaf Functionality To Different Drought Duramentioning

confidence: 98%

“…The middle segments of the uppermost and fully expanded leaves were collected after measurement, and immediately stored in liquid nitrogen, and then kept at −80 • C. H 2 O 2 content was measured as described in Reference [28]. Leaf samples (0.2 g) were homogenized in 3 mL of acetone.…”

Section: Measurement Of H 2 O 2 Content Mda Content and Antioxidantmentioning

confidence: 99%

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

et al. 2020

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The drought tolerance and capacity to recover after drought are important for plant growth and yield. In this study, two maize lines with different drought resistance were used to investigate the effects of different drought durations and subsequent re-watering on photosynthetic capacity, electron transfer and energy distribution, and antioxidative defense mechanisms of maize. Under short drought, maize plants decreased stomatal conductance and photosynthetic electron transport rate, and increased NPQ (Non-photochemical quenching) to dissipate excess excitation energy in time and protect the photosynthetic apparatus. With the increased drought duration, NPQ, antioxidase activity, PItotal (total performance index), ∆I/Io, ψEo (quantum yield for electron transport), φEo (efficiency/probability that an electron moves further than QA−), δRo (efficiency/probability with which an electron from the intersystem electron carriers is transferred to reduce end electron acceptors at the PSI acceptor side) and φRo (the quantum yield for the reduction of the end electron acceptors at the PSI acceptor side) were significantly reduced, while Y(NO) (quantum yield of nonregulated energy dissipation) and MDA (malondialdehyde) began to quickly increase. The photosynthetic rate and capacity of photosynthetic electron transport could not recover to the level of the plants subjected to normal water status after re-watering. These findings indicated that long drought damaged the PSI (photosystem I) and PSII (photosystem II) reaction center and decreased the electron transfer efficiency, and this damage could not be recovered by re-watering. Different drought resistance and recovery levels of photosynthetic performance were achieved by different maize lines. Compared with D340, D1798Z had higher NPQ and antioxidase activity, which was able to maintain functionality for longer in response to progressive drought, and it could also recover at more severe drought after re-watering, which indicated its higher tolerance to drought. It was concluded that the capacity of the energy dissipation and antioxidant enzyme system is crucial to mitigate the effects caused by drought, and the capacity to recover after re-watering was dependent on the severity and persistence of drought, adaptability, and recovery differences of the maize lines. The results provide a profound insight to understand the maize functional traits’ responses to drought stresses and re-watering.

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“…Sweet sorghum [Sorghum bicolor (L.) Moench], which is also known as sugar sorghum, is an annual C4 crop (family Gramineae) with a high biomass and tolerance to adverse conditions, including salinity, drought, and flooding (Guo et al, 2018). In an earlier study, we determined that the differences between the salt-tolerant sweet sorghum line (M-81E) and the salt-sensitive line (Roma) are partly due to the diversity in the regulation of certain genes in specific pathways (Yang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptome Analysis Reveals New lncRNAs Responding to Salt Stress in Sweet Sorghum

Sun

Zheng

et al. 2020

Front. Bioeng. Biotechnol.

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Energy dissipation and antioxidant enzyme system protect photosystem II of sweet sorghum under drought stress

Cited by 119 publications

References 64 publications

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

Response of Photosynthetic Performance to Drought Duration and Re-Watering in Maize

Comparative Transcriptome Analysis Reveals New lncRNAs Responding to Salt Stress in Sweet Sorghum

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