Effect of salt stress on the growth and photosystem II photochemical characteristics of Lycium ruthenicum Murr. seedlings

Guo, Youyan; Nie, Hualin; Yu, Hua; Kong, D.-S.; Wu, Jie

doi:10.32615/ps.2019.068

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…By contrast, there was a progressive increase in the dissipation of energy in the form of heat (DI 0 /RC) at 150 DAT and 180 DAT, which is also consistent with the effects of stress on the plant. Under stress, a proportion of the reaction centers (DI 0 /RC) become dissipative centers to avoid photo-oxidative damage to the photosynthetic apparatus (e.g., [ 60 , 61 ]).…”

Section: Discussionmentioning

confidence: 99%

Morpho-Anatomical and Physiological Responses Can Predict the Ideal Period for the Transplantation of Hydroponic Seedlings of Hymenaea courbaril, a Neotropical Fruit Tree

Sousa

Bessa

Silva

et al. 2020

Plants

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Hydroponics is an excellent alternative approach for the production of seedlings, given the growing demand for fruiting trees for the reforestation or recuperation of degraded natural landscapes. In most cases, however, little is known about the optimal period for the maintenance of the seedling in the hydroponic system. Given this, we decided to investigate the hypothesis that morpho-anatomical and physiological alterations can be used to predict the optimal timing for the transplantation of the seedlings to the soil substrate, thereby guaranteeing the most cost-effective application of the hydroponic system. We selected Hymenaea courbaril L., an important Neotropical fruit tree, as the model for this study. We cultivated H. courbaril seedlings in a static hydroponic system and evaluated morpho-anatomical, physiological, and growth parameters over the course of seedling development (30, 60, 90, 120, 150, and 180 days after transplantation; DAT). We observed an interesting relationship between the increase in the density (SD) and conductance (gsw) of the stomata up to 120 DAT, which reflected higher rates of photosynthesis (A), but also a reduced efficiency in the use of water. In the subsequent intervals, the SD of the plants and the diameter of the radicular xylemic vessels elements (RVE) decreased, in an attempt to increase the efficiency of the use of this resource. We also observed an increase in the thickness of the palisade parenchyma (PP) prior to 120 DAT, which did not reflect a general increase in the thickness of the mesophyll, indicating an adjustment in the thickness of the spongiform parenchyma (SP). We also observed a progressive increase in photosynthetic efficiency up to 120 DAT, based on parameters such as the absorption flux energy per active reaction center (ABS/RC) and the photosynthetic performance index (PIABS), but after this period these indices decreased progressively. However, as the PIABS is an indicator of the plant’s tolerance, its decline was associated with an increase in the dissipation of energy (DI0/RC), which indicates that, after 120 DAT, the plant pots may become a stress factor that limit the growth of H. courbaril seedlings. The results of the present study indicate conclusively that a 120-day period is the optimum for the maintenance of the H. courbaril seedlings in the hydroponic system, and also confirm the hypothesis that the morpho-anatomical and physiological responses observed in the plants can be used to predict the ideal period for the transplantation of the seedlings, contributing to a reduction in production time of the hydroponic system.

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Section: Discussionmentioning

confidence: 99%

Morpho-Anatomical and Physiological Responses Can Predict the Ideal Period for the Transplantation of Hydroponic Seedlings of Hymenaea courbaril, a Neotropical Fruit Tree

Sousa

Bessa

Silva

et al. 2020

Plants

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“…Biotic and abiotic stresses may reduce the quantum efficiency of PSII photochemistry (Guo et al 2019). Higher φP 0 values imply a higher quantum yield on the donor and acceptor sides of the PSII.…”

Section: Rootstocksmentioning

confidence: 99%

Evaluating the effect of grafting methods and rootstocks through the analysis of chlorophyll a fluorescence

CRASQUE,

CERRI NETO,

PINTO

et al. 2023

Photosynt.

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Abbreviations: ABS/RC -energy absorption flux; DI0/RC -dissipated energy flux per reaction center; ET0/RC -photosynthetic electron transport flux per reaction center; F0 -minimum fluorescence yield of the dark-adapted state; Fm -maximum fluorescence; PI(ABS)photosynthetic efficiency performance index; RC/CSm -density of reaction center per maximum cross-section; TR0/RC -trapped energy flux; φD0 -quantum yield of energy dissipation; φP0 -maximum quantum yield of primary photochemistry.

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New insights into the salt tolerance of the extreme halophytic species Lycium humile (Lycieae, Solanaceae)

Palchetti

Reginato

Llanes

et al. 2021

Plant Physiology and Biochemistry

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Effect of salt stress on the growth and photosystem II photochemical characteristics of Lycium ruthenicum Murr. seedlings

Cited by 8 publications

References 19 publications

Morpho-Anatomical and Physiological Responses Can Predict the Ideal Period for the Transplantation of Hydroponic Seedlings of Hymenaea courbaril, a Neotropical Fruit Tree

Morpho-Anatomical and Physiological Responses Can Predict the Ideal Period for the Transplantation of Hydroponic Seedlings of Hymenaea courbaril, a Neotropical Fruit Tree

Evaluating the effect of grafting methods and rootstocks through the analysis of chlorophyll a fluorescence

New insights into the salt tolerance of the extreme halophytic species Lycium humile (Lycieae, Solanaceae)

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