Effects of drought stress on fluorescence characteristics of photosystem II in leaves of Plectranthus scutellarioides

Meng, Liang; Song, Jinhui; Wen, Jiaming; Zhang, J.; Wei, Jing

doi:10.1007/s11099-016-0191-0

Cited by 72 publications

(57 citation statements)

References 27 publications

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“…Therefore, F v / F m will decrease under drought stress. Our finding was consistent with a previous studying, in which drought stress inhibited the photochemical activity of PSII and decreased leaf F v /F m (Meng et al 2016). Meanwhile, our study showed that F v /F m was largely related to J max and Chl t under drought stress (Figures 4f, h).…”

Section: J Max and Chl T Governed Chlf Ratio Under Drought Stresssupporting

confidence: 93%

Peer Review #1 of "Drought stress strengthens the link between chlorophyll fluorescence parameters and photosynthetic traits (v0.1)"

2020

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Chlorophyll fluorescence (ChlF) has been used to understand photosynthesis and its response to climate change, particularly with satellite-based data. However, it remains unclear how the ChlF ratio and photosynthesis are linked at the leaf level under drought stress. Here, we examined the link between ChlF ratio and photosynthesis at the leaf level by measuring photosynthetic traits, such as net CO 2 assimilation rate (A n), the maximum carboxylation rate of Rubisco (V cmax), the maximum rate of electron transport (J max), stomatal conductance (g s) and total chlorophyll content (Chl t). The ChlF ratio of the leaf level such as maximum quantum efficiency of PSII (F v /F m) based on fluorescence kinetics. ChlF intensity ratio (LD 685 /LD 740) based on spectrum analysis was obtained. We found that a combination of the stomatal limitation, non-stomatal limitation, and Chl t regulated leaf photosynthesis under drought stress, while J max and Chl t governed the ChlF ratio. A significant link between the ChlF ratio and A n was found under drought stress while no significant correlation in the control, which indicated that drought stress strengthens the link between the ChlF ratio and photosynthetic traits. These results suggest that the ChlF ratio can be a powerful tool to track photosynthetic traits of terrestrial ecosystems under drought stress.

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Section: J Max and Chl T Governed Chlf Ratio Under Drought Stresssupporting

confidence: 93%

Peer Review #1 of "Drought stress strengthens the link between chlorophyll fluorescence parameters and photosynthetic traits (v0.1)"

2020

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“…Fv/Fm exhibits the maximal efficiency of PSII photochemistry, which is stable in general. The decrease of Fv/Fm may be considered as a potential indicator for environmental stress (Strasser et al 2000, Meng et al 2015. The measurement at 7, 14, and 21 d showed that Fv/Fm, ΦPSII, and qP increased in all LaCl3 treatments ( Fig.…”

Section: Discussionmentioning

confidence: 88%

Lanthanum chloride enhances the photosynthetic characteristics and increases konjac glucomannan contents in Amorphophallus sinensis Belval

Li¹,

Yu²,

Dong³

et al. 2020

Photosynt.

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Lanthanum (La) has been used as agricultural inputs in order to enhance yield and improve crop quality. However, little is known about the effect of La on the photosynthesis and growth of Amorphophallus sinensis, a worldwide food source. The effects of La on the photosynthetic and chlorophyll fluorescence parameters, photosynthetic pigments, corm yield, and konjac glucomannan (KGM) of Amorphophallus sinensis were investigated via field experiments. The leaves were sprayed with different concentrations of LaCl3 (20, 80, 160, and 240 mg L-1). The results exhibited an increasing effect of LaCl3 on photosynthetic rate, stomatal conductance, intercellular CO2 concentration, chlorophyll fluorescence parameters, photosynthetic pigments, corm yield, and KGM, when concentration was between 20 and 240 mg L-1 , and the most effective concentration was 160 mg L-1. Therefore, moderate LaCl3 concentration may increase yield of Amorphophallus sinensis by enhancing the photosynthetic efficiency, increasing the corm yield, and KGM contents.

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“…In Plectranthus scutellarioides (Lamiaceae) F v /F m values decreased within 2–3 weeks in the third expanded leaf of drought‐stressed plants compared to control plants (Meng et al . ). However, in that study, water was withheld completely from drought‐stressed plants leading to a severe stress level.…”

Section: Discussionmentioning

confidence: 97%

“…The maximum quantum yield of photosystem (PS) II (F v /F m ) declines with decreasing soil water content (Meng et al . ) and can be drastically reduced after a severe drought period, for example, in wheat and cowpea (Souza et al . ; Paknejad et al .…”

Section: Introductionmentioning

confidence: 99%

Effects of continuous versus pulsed drought stress on physiology and growth of wheat

2018

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In the course of climate change, crop plants are exposed to both altered precipitation volumes and frequencies in many cultivation areas. Reduced water availability and longer periods without precipitation can lead to changes in plant physiology and productivity. In this greenhouse study, we investigated physiological responses, including maximum quantum yield of photosystem II (F /F ) and water use efficiency (WUE) as well as diverse productivity-related parameters, including grain yield per plant, to continuous (irrigated three times a week) versus pulsed (once a week) irrigation in spring wheat (Triticum aestivum L.). In both drought regimes, plants were exposed to four different irrigation volumes. F /F was not influenced by irrigation treatment but was significantly higher after 6 weeks of drought than after 2 weeks. WUE increased with decreasing irrigation volume and based on generative biomass; it was higher in continuously-watered compared to pulsed-watered plants that received a similar amount of water over the experiment. Infrequent irrigation led to a reduction in grain yield of up to 51%. This lower productivity was primarily caused by fewer tillers in pulsed-watered plants. Additionally, at low water volume the thousand grain weight (TGW) was lower in infrequently-compared to frequently-watered plants. In contrast, the number of grains per ear was higher in pulsed-watered plants. In conclusion, reduced irrigation frequency, next to a decrease in irrigation volume, negatively affects WUE and grain yield of spring wheat. These results might have important implications for irrigation scheduling and breeding programmes under a changing climate.

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Effects of drought stress on fluorescence characteristics of photosystem II in leaves of Plectranthus scutellarioides

Cited by 72 publications

References 27 publications

Peer Review #1 of "Drought stress strengthens the link between chlorophyll fluorescence parameters and photosynthetic traits (v0.1)"

Peer Review #1 of "Drought stress strengthens the link between chlorophyll fluorescence parameters and photosynthetic traits (v0.1)"

Lanthanum chloride enhances the photosynthetic characteristics and increases konjac glucomannan contents in Amorphophallus sinensis Belval

Effects of continuous versus pulsed drought stress on physiology and growth of wheat

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