Allocation of photosynthestically-fixed carbon in plant and soil during growth of reed (Phragmites australis) in two saline soils

Li, Ling; Qiu, Shaojun; Chen, Yinping; Xu, Xingliang; Zhao, Xingbo; Christie, Peter; Xu, Minggang

doi:10.1007/s11104-016-2840-2

Cited by 11 publications

(2 citation statements)

References 76 publications

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“…These genetic regulations include higher relative expression levels of genes associated with photosynthesis and lignan biosynthesis, indicative of a greater ability to maintain growth under saline conditions [ 24 ]. At the same time, the distribution of photosynthetically fixed C in roots and soils also changes, for example, with lower contents of photosynthetically fixed C in roots and higher contents in soil [ 25 ].…”

Section: Discussionmentioning

confidence: 99%

Comparison of the Photosynthetic Capacity of Phragmites australis in Five Habitats in Saline‒Alkaline Wetlands

Liu

Wen

et al. 2020

Plants

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Water shortages have an important impact on the photosynthetic capacity of Phragmites australis. However, this impact has not been adequately studied from the perspective of photosynthesis. An in-depth study of the photosynthetic process can help in better understanding the impact of water shortages on the photosynthetic capacity of P. australis, especially on the microscale. The aim of this study is to explore the photosynthetic adaptation strategies to environmental changes in saline‒alkaline wetlands. The light response curves and CO2 response curves of P. australis in five habitats (hygrophilous, xerophytic, psammophytic, abandoned farmland, paddy field drainage) in saline‒alkaline wetlands were measured at different stages of their life history, and we used a nonrectangular hyperbolic model to fit the data. It was concluded that P. australis utilized coping strategies that differed between the growing and breeding seasons. P. australis in abandoned farmland during the growing season had the highest apparent quantum efficiency (AQE) and photosynthetic utilization efficiency for weak light because of the dark environment. The dark respiration rate of P. australis in the drainage area of paddy fields was the lowest, and it had the highest values for photorespiration rate, maximum photosynthetic rate (Pmax), photosynthetic capacity (Pa), biomass, maximum carboxylation rate (Vcmax), and maximum electron transfer rate (Jmax). The light insensitivity of P. australis increased with the transition from growing to breeding season, and the dark respiration rate also showed a downward trend. Moreover, Vcmax and Jmax would decline when Pmax and Pa showed a declining trend, and vice versa. In other words, Vcmax and Jmax could explain changes in the photosynthetic capacity to some extent. These findings contribute to providing insights that Vcmax and Jmax can directly reflect the variation in photosynthetic capacity of P. australis under water shortages in saline‒alkaline wetlands and in other parts of world where there are problems with similarly harmful environmental conditions.

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Section: Discussionmentioning

confidence: 99%

Comparison of the Photosynthetic Capacity of Phragmites australis in Five Habitats in Saline‒Alkaline Wetlands

Liu

Wen

et al. 2020

Plants

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“…This starch is then degraded and converted to soluble sugars (mainly sucrose) to supply the plants with carbohydrates during the following night (Smith and Stitt , Zeeman et al ). Most studies only used 13 CO 2 labeling to track the partitioning of newly fixed C into different tissues (Meng et al , Bloemen et al , Li et al ). The pattern of soil DIC assimilation, with respect to post‐photosynthate allocation, should be similar to that of atmospheric CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Bicarbonate stimulates non‐structural carbohydrate pools of Camptotheca acuminata

Rao

Rui

2018

Physiologia Plantarum

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The role of root-derived dissolved inorganic carbon (DIC) has been emphasized lately, as it can provide an alternative source of carbon for photosynthesis. The fate of newly fixed DIC and its effect on non-structural carbohydrate (NSC) pools has not been thoroughly elucidated to date. To this end, we used C (NaHCO ) as a substrate tracer to investigate the incorporation of newly fixed bicarbonate into the plant organs and NSC compounds of Camptotheca acuminata seedlings for 24 and 72 h. NSC levels across the organs were all markedly increased within 24 h of labeling treatment and afterward only decreased in stems at 72 h. The variation range of NSC concentrations in roots was considerably smaller than in the stem and leaves. As time passed, the δ C in NSC compounds was significantly affected by C labeling and was more positive in the roots than in the stem and leaves. Starch was more C-enriched than was soluble carbohydrate, and the δ C of root starch was as high as -4.70‰. Bicarbonate incorporation into newly formed NSC compounds contributed up to 0.24% of the root starch within 72 h. These data provided strong evidence that bicarbonate not only acted as a C source that contributed slightly to the NSC pools but also stimulated the increase in NSC pools. The present study expands our understanding of the rapid change of NSC pools across the organs in response to bicarbonate.

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Effects of waterlogging and elevated salinity on the allocation of photosynthetic carbon in estuarine tidal marsh: a mesocosm experiment

Xie

et al. 2022

Plant Soil

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Allocation of photosynthestically-fixed carbon in plant and soil during growth of reed (Phragmites australis) in two saline soils

Cited by 11 publications

References 76 publications

Comparison of the Photosynthetic Capacity of Phragmites australis in Five Habitats in Saline‒Alkaline Wetlands

Comparison of the Photosynthetic Capacity of Phragmites australis in Five Habitats in Saline‒Alkaline Wetlands

Bicarbonate stimulates non‐structural carbohydrate pools of Camptotheca acuminata

Effects of waterlogging and elevated salinity on the allocation of photosynthetic carbon in estuarine tidal marsh: a mesocosm experiment

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