Chlorophyll fluorescence as a tool to identify drought stress in Acer genotypes

Banks, Jonathan M.

doi:10.1016/j.envexpbot.2018.06.022

Cited by 120 publications

(64 citation statements)

References 47 publications

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“…Grown under 5 and 30 min nutrient spraying intervals, F v /F m ratios of M. crystallinum were close or above 0.8 while plants grown under 60 and 240 min had their F v /F m ratio below 0.8 (Fig 6A), which may indicate reduced maximal quantum yield of PS II, resulting from drought stress [61]. However, some researchers pointed out that the F v /F m ratio may be suitable for drought sensitive species but not for drought insensitive species [62,63]. Li et al [64] reported that a severe drought episode during the peak vegetative growth stage of maize plants resulted in decreases in Chl content, F v /F m ratio, qP but increases in NPQ.…”

Section: Plos Onementioning

confidence: 96%

Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum

Chua

Qin

2020

PLoS ONE

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Physiology and nutritional quality of a facultative CAM plant Mesembryanthemum crystallinum under drought stress alone are poorly understood. To induce drought, M. crystallinum was cultured aeroponically with different nutrient spraying intervals such as 5, 30, 60 and 240 min. The long spraying interval such as 240 min resulted in lower mass of root and shoot, shorter total root length with less tips and smaller surface area, compared to short interval of 5 min. Grown under the longest spraying interval of 240 min, M. crystallinumalso had significantly higher leaf dry matter content but lower leaf succulence. However, CAM acidity was undetectable for any plants. Although M. crystallinum grown under extended spraying intervals had higher photosynthetic pigments, they utilized lesser light energy and did not dissipate heat as effectively as those grown under 5 min. Compare to other shorter spraying intervals, photosynthetic gas exchange rates were significantly reduced under 240 min spraying interval, indicating signs of water deficit stress. Shoot nitrate, total reduced nitrogen, total soluble protein and Rubisco concentrations were similar for all plants. For phytochemicals and dietary minerals, plants grown under 240 min spraying interval had significantly higher values than the other plants. Therefore, drought does not result in the induction of CAM but regulates photosynthetic performance and enhances nutritional quality of M. crystallinum.

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Section: Plos Onementioning

confidence: 96%

Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum

Chua

Qin

2020

PLoS ONE

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“…Overall, La effects on photosynthetic pigments could be time-dependent. Effect of La on Chl fluorescence parameters: Chl fluorescence parameters reflect the physiology and mechanism of photosynthesis, which are not only the indicator of the light-use efficiency, but the evaluation index of the plant under environmental stresses (Janka et al 2013, Guo et al 2015, Banks 2018, Hanelt 2018, Dai and Shan 2019. Fv/Fm exhibits the maximal efficiency of PSII photochemistry, which is stable in general.…”

Section: Discussionmentioning

confidence: 99%

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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“…Chlorophyll fluorescence has been shown to be a viable quantitative indicator of drought stress and survival (Woo et al 2008;Jedmowski et al 2015;Kalaji et al 2017;Banks 2018). Measurements were performed on leaf material from both the whole-tree drought and foliar dehydration.…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

“…F 0 at T0 was used during this study (Banks 2017). The sensitivity of Fv/Fm is known to vary in response to drought stress (Banks 2018), researchers should use caution relying on this parameter alone for drought trials particularly when stress is not severe. Time for the chlorophyll fluorescence parameter Fv/Fm to decline by 50% was calculated per tree, using a linear regression and results per tree were subsequently analysed (Drought n = 5 R 2 = 0.85 ± 0.21, Dehydrated n = 10 average R 2 = 0.79 ± 0.11).…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

Variations in seasonal drought tolerance rankings

Banks

Percival²,

Rose

2019

Trees

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Key message Cultivars of Acer platanoides, A. pseudoplatanus and A. campestre show significant seasonal drought tolerance variation, identified by in vitro desiccation a whole-tree drought and water potential at turgor-loss-point. Abstract Drought is one of the most common and significant disorders affecting tree establishment and growth, in the urban environment. Consequently, improving tree selection by the provision of quantifiable tolerance data by which to evaluate genotypes is an important area of scientific research. A number of in vitro studies address drought tolerance in isolation, at a single time point during the growing season. Using an in vitro foliar dehydration method to evaluate closely related genotypes of Acer platanoides, A. pseudoplatanus and A. campestre, drought tolerance rankings were not found to be consistent throughout the growing season (spring, summer and autumn). i.e., A. pseudoplatanus 'Negenia' was found to be comparatively drought tolerant in spring, but displayed moderate to low comparative tolerance in summer and autumn; as measured using in vitro foliar dehydration as a proxy for drought tolerance. Drought conditions are most severe and common in summer; however, this study discusses the need to consider spring tolerance in addition to summer or autumn, particularly when selecting trees for tough urban sites, prone to drought stress across all three seasons.

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Chlorophyll fluorescence as a tool to identify drought stress in Acer genotypes

Cited by 120 publications

References 47 publications

Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum

Drought does not induce crassulacean acid metabolism (CAM) but regulates photosynthesis and enhances nutritional quality of Mesembryanthemum crystallinum

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

Variations in seasonal drought tolerance rankings

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