The Growth and Physiological Characteristics of the Endangered CAM Plant, Nadopungnan (Sedirea japonica), under Drought and Climate Change Scenarios

Song, Yeong Geun; Hwang, Jin-Woo; An, Jiae; Kim, Pyoung Beom; Park, Hyeong Bin; Park, Hwan Joon; Kim, Seongjun; Lee, Chang Woo; Lee, Byoung-Doo; Kim, Nam Young; Lee, Kyeong-Cheol

doi:10.3390/f13111823

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…While the SFI increased to the control values in Chinese cabbage after recovery, in white cabbage, the SFI remained as low as it was in drought-stressed seedlings. Various stressful conditions, such as salinity [97], PEG−induced drought stress, and salt stress [98][99][100], provoked changes that caused the instability of photosystems. An SFI decrease reflects the limited electron transport and diminished overall photosynthetic activity.…”

Section: Changes In Jip-test Parameters After Drought and Recoverymentioning

confidence: 99%

Comparative Analysis of Primary Photosynthetic Reactions Assessed by OJIP Kinetics in Three Brassica Crops after Drought and Recovery

et al. 2023

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Plant drought tolerance depends on adaptations of the photosynthetic apparatus to changing environments triggered by water deficit. The seedlings of three Brassica crops differing in drought sensitivity, Brassica oleracea L. var. capitata—white cabbage, Brassica oleracea L. var. acephala—kale, and Brassica rapa L. var. pekinensis—Chinese cabbage, were exposed to drought by withholding water. Detailed insight into the photosynthetic machinery was carried out when the seedling reached a relative water content of about 45% and after re-watering by analyzing the OJIP kinetics. The key objective of this study was to find reliable parameters for distinguishing drought−tolerant and drought-sensitive varieties before permanent structural and functional changes in the photosynthetic apparatus occur. According to our findings, an increase in the total performance index (PItotal) and structure–function index (SFI), positive L and K bands, total driving forces (DDF), and drought resistance index (DRI) suggest drought tolerance. At the same time, susceptible varieties can be distinguished based on negative L and K bands, PItotal, SFI, and the density of reaction centers (RC/CS0). Kale proved to be the most tolerant, Chinese cabbage was moderately susceptible, and white cabbage showed high sensitivity to the investigated drought stress. The genetic variation revealed among the selected Brassica crops could be used in breeding programs and high-precision crop management.

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Section: Changes In Jip-test Parameters After Drought and Recoverymentioning

confidence: 99%

Comparative Analysis of Primary Photosynthetic Reactions Assessed by OJIP Kinetics in Three Brassica Crops after Drought and Recovery

et al. 2023

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Evaluation of potential increase in photosynthetic efficiency of cassava (Manihot esculenta Crantz) plants exposed to elevated carbon dioxide

Ravi,

Raju,

2024

Funct. Plant Biol.

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Cassava (Manihot esculenta Crantz), an important tropical crop, is affected by extreme climatic events, including rising CO2 levels. We evaluated the short-term effect of elevated CO2 concentration (ECO2) (600, 800 and 1000 ppm) on the photosynthetic efficiency of 14 cassava genotypes. ECO2 significantly altered gaseous exchange parameters (net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 (Ci) and transpiration (E)) in cassava leaves. There were significant but varying interactive effects between ECO2 and varieties on these physiological characteristics. ECO2 at 600 and 800 ppm increased the Pn rate in the range of 13–24% in comparison to 400 ppm (ambient CO2), followed by acclimation at the highest concentration of 1000 ppm. A similar trend was observed in gs and E. Conversely, Ci increased significantly and linearly across increasing CO2 concentration. Along with Ci, a steady increase in water use efficiency [WUEintrinsic (Pn/gs) and WUEinstantaneous (Pn/E)] across various CO2 concentrations corresponded with the central role of restricted stomatal activity, a common response under ECO2. Furthermore, Pn had a significant quadratic relationship with the ECO2 (R2 = 0.489) and a significant and linear relationship with Ci (R2 = 0.227). Relative humidity and vapour pressure deficit during the time of measurements remained at 70–85% and ~0.9–1.31 kPa, respectively, at 26 ± 2°C leaf temperature. Notably, not a single variety exhibited constant performance for any of the parameters across CO2 concentrations. Our results indicate that the potential photosynthesis can be increased up to 800 ppm cassava varieties with high sink capacity can be cultivated under protected cultivation to attain higher productivity.

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The Growth and Physiological Characteristics of the Endangered CAM Plant, Nadopungnan (Sedirea japonica), under Drought and Climate Change Scenarios

Cited by 2 publications

References 46 publications

Comparative Analysis of Primary Photosynthetic Reactions Assessed by OJIP Kinetics in Three Brassica Crops after Drought and Recovery

Comparative Analysis of Primary Photosynthetic Reactions Assessed by OJIP Kinetics in Three Brassica Crops after Drought and Recovery

Evaluation of potential increase in photosynthetic efficiency of cassava (Manihot esculenta Crantz) plants exposed to elevated carbon dioxide

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