Long-term high light stress induces leaf senescence in wheat  (Triticum aestivum L.)

Liu, Y.N.; Xu, Qin-Yi; Li, W.C.; Yang, Xinghong; Zheng, Qi; Li, B.; Li, Z.S.; Li, H.W.

doi:10.32615/ps.2019.086

Cited by 16 publications

(13 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results in Fig. 2 showed that LI, LT, and LL stresses caused the decrease in PN of strawberry leaves, while the Ci increased, indicating that under the above three adverse stresses, the decline of photosynthesis was not caused by a decrease in the supply of CO2 due to reduced gs, but was caused by nonstomatal limitations (such as the loss of Rubisco and photochemical activity) that hindered the utilization of CO2, resulting in the accumulation of intercellular CO2 (Allen and Ort 2001, Gerganova et al 2016, Liu et al 2019. Besides, the contents of total Chl also decreased by LI, LT, and LL stresses, and after recovery for 15 d, the total Chl content under LI and LT stresses returned to the control level, while this did not happen under LL stress ( Table 1).…”

Section: Discussionmentioning

confidence: 98%

Low temperature and low irradiation induced irreversible damage of strawberry seedlings

Xu¹,

Wang²,

Yang³

et al. 2020

Photosynt.

View full text Add to dashboard Cite

Low temperature (LT) and low irradiation (LI) are common factors posing a great risk to plants. The study aimed to elucidate the effects of LT and LI and recovery on the photosynthetic apparatus, photoinhibition of PSII, and reactive oxygen metabolism of strawberry seedlings. The results showed that strawberry growth slowed down or even stopped and total chlorophyll content, stomatal conductance, net photosynthetic rate, and maximal quantum yield of PSII photochemistry decreased, while intercellular CO2 concentration increased under LI, LT, and combined stress (LL). Additionally, JIP-test showed that compared to LI or LT stress, LL-stressed plants had lower quantum yields and efficiencies and functional antenna size, and higher reaction center activity. Besides, the contents of hydrogen peroxide and malondialdehyde increased, while the activity of superoxide dismutase, peroxidase, and catalase were significantly inhibited compared with the control. After the stress was relieved, the photosynthesis of LL-stressed plants recovered poorly.

show abstract

Section: Discussionmentioning

confidence: 98%

Low temperature and low irradiation induced irreversible damage of strawberry seedlings

Xu¹,

Wang²,

Yang³

et al. 2020

Photosynt.

View full text Add to dashboard Cite

show abstract

“…The OJIP curve contains mass information about the functional integrity of the photosynthetic electron transport chain (PETC), the primary site of ROS production in leaves under light (Brestic, Zivcak, Kalaji, Carpentier, & Allakhverdiev, 2012;Dou, Xv, Meng, Li, & Yang, 2015;Liu et al, 2019). The shape of the OJIP curve changed obviously in leaves of both ZD958 and XY335 after HT treatment (Figure 6a-d).…”

Section: Ht Treatment Restrained Photosynthetic Electron Transfer Amentioning

confidence: 99%

High temperature reduces photosynthesis in maize leaves by damaging chloroplast ultrastructure and photosystem II

Ren

et al. 2020

J Agronomy Crop Science

View full text Add to dashboard Cite

Global warming has increased the frequency and duration of high temperature (HT) stress. Photosynthesis determines yield in maize and is extremely HT sensitive. The effects of HT on photosynthesis in maize leaves have been strongly examined under controlled conditions. Here, to explore the mechanism and primary inhibitory sites of HT to photosynthesis, the HT sensitivity of photosynthesis in XY335 and ZD958 maize hybrids was systematically studied in field by multiple methods. HT decreased leaf area and photosynthetic rate of unit leaf area and hence limited growth. HT disrupted chloroplast and mitochondrial membrane structure, possibly delaying photosynthetic recovery after HT. These changes were greater in XY335 than ZD958. Stomatal conductance decreased significantly under HT, and this did not restrict CO2 fixation but may weaken the heat dissipation through transpiration. HT caused photoinhibition of PSII but not PSI. HT damaged both the oxygen‐evolving complex, located at donor side of PSII, and electron transfer from QA to QB, located at acceptor side of PSII. Interference of electron transfer from QA to QB caused by degradation of QB‐binding (D1) protein was the primary site of PSII inhibition by HT in maize leaves. The different stomatal behaviour and photoinhibition sites under HT between maize and wheat were discussed.

show abstract

“…The antioxidant system maintains an optimal level of ROS [22] and protects cells and cell compartments against oxidative damage under various environmental stresses [41,42]. Besides the ascorbate-glutathione cycle, α-tocopherol, carotenoids, flavonoids, thioredoxins (TRXs), accumulation and stress symptoms in Arabidopsis [54] and pea [55] leaves, while prolonged HL stress had a similar effect in wheat (Figure 1b) [56]. The changes in ROS levels occur immediately after the exposure to HL and provide a signalling function in order to initiate various adaptive mechanisms, as demonstrated in Arabidopsis [57].…”

Section: Introductionmentioning

confidence: 97%

Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

et al. 2022

View full text Add to dashboard Cite

Both light intensity and spectrum (280–800 nm) affect photosynthesis and, consequently, the formation of reactive oxygen species (ROS) during photosynthetic electron transport. ROS, together with antioxidants, determine the redox environment in tissues and cells, which in turn has a major role in the adjustment of metabolism to changes in environmental conditions. This process is very important since there are great spatial (latitude, altitude) and temporal (daily, seasonal) changes in light conditions which are accompanied by fluctuations in temperature, water supply, and biotic stresses. The blue and red spectral regimens are decisive in the regulation of metabolism because of the absorption maximums of chlorophylls and the sensitivity of photoreceptors. Based on recent publications, photoreceptor-controlled transcription factors such as ELONGATED HYPOCOTYL5 (HY5) and changes in the cellular redox environment may have a major role in the coordinated fine-tuning of metabolic processes during changes in light conditions. This review gives an overview of the current knowledge of the light-associated redox control of basic metabolic pathways (carbon, nitrogen, amino acid, sulphur, lipid, and nucleic acid metabolism), secondary metabolism (terpenoids, flavonoids, and alkaloids), and related molecular mechanisms. Light condition-related reprogramming of metabolism is the basis for proper growth and development of plants; therefore, its better understanding can contribute to more efficient crop production in the future.

show abstract

Long-term high light stress induces leaf senescence in wheat (Triticum aestivum L.)

Cited by 16 publications

References 68 publications

Low temperature and low irradiation induced irreversible damage of strawberry seedlings

Low temperature and low irradiation induced irreversible damage of strawberry seedlings

High temperature reduces photosynthesis in maize leaves by damaging chloroplast ultrastructure and photosystem II

Light Intensity- and Spectrum-Dependent Redox Regulation of Plant Metabolism

Contact Info

Product

Resources

About