Effects of salinity and clonal integration on the amphibious plant<i>Paspalum paspaloides</i>: growth, photosynthesis and tissue ion regulation

Xing, Yaping; Wei, Guan-Wen; Luo, Fang‐Li; Li, Chaoyang; Dong, Bi-Cheng; Ji, Jie-Shan; Yu, Fei‐Hai

doi:10.1093/jpe/rtx061

Cited by 14 publications

(9 citation statements)

References 47 publications

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“…The results of this experiment showed that belowground biomass decreased significantly with increasing salinity when compared with the salt‐free treatments. Our results are consistent with previous studies of root response to salt stress in Spartina alterniflora and Paspalum paspaloides (MacTavish and Cohen 2017, Xing et al 2019). Our study also found that the biomass accumulation reached the maximum at 25/15°C under salt stress, and the greater the difference with respect to this temperature, the greater the decline in the biomass accumulation.…”

Section: Discussionsupporting

confidence: 93%

Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

et al. 2021

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In a scenario of climate change and intensive land-use change, the issue of salt marsh degradation caused by global warming and soil salinization is becoming more serious. A climate chamber experiment was conducted to examine the responses of tuber sprouting and seedling growth of Schoenoplectus nipponicus to variations in the temperature regimes (20/10, 25/15, 30/20 and 35/25°C; 12-h light/dark 12-h photoperiod) and different salt concentrations (0, 50, 75, and 100 mmol/L salinity). Results showed that the final sprouting percentage decreased with the increase in salinity and increased with the rising temperature. Salinity lower than 50 mmol/L was the most favorable for tuber sprouting. Under high salinity (75 and 100 mmol/L salinity), the inhibition of tuber sprouting at 20/10°C was greater than other temperature regimes. Along the temperature gradients, both plant height and leaf N content increased, and root length decreased under non-saline-alkali conditions, while plant height, leaf N content, and root length declined significantly under salt stress (50, 75, and 100 mmol/L salinity). With the increase in temperature, the production of tubers under the control treatments was enhanced significantly, but that under salt stress declined significantly. Under 0 mmol/L salinity, the accumulation of biomass in various organs increased with rising temperature. Biomass accumulation increased first and then declined for plants grown under salt stress, with a peak value of 25/15°C. Root: shoot ratio was reduced significantly under the combination of high salt stress (75 and 100 mmol/L salinity) and high temperatures (30/20°C and 35/25°C). Our study will contribute to a better understanding of the influence of climate warming and increasing serious human disturbances on this important wetland species.

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Section: Discussionsupporting

confidence: 93%

Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

et al. 2021

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“…Na + accumulated significantly less in stressed ramets and whole plants when physiological integration occurred. This finding agrees with previous results in Paspalum paspaloides (Xing et al, 2019) and Zoysia matrella (Sugiura & Takahashi, 2021) and highlights an important mechanism of physiological integration enhancing salt tolerance. Na + is absorbed by the root system and is transported via the vascular system from root to shoot when plants suffer from salt stress (Foster & Miklavcic, 2019).…”

Section: Discussionsupporting

confidence: 93%

“…Because the benefits were greater than the expenses, physiological integration favored the whole bermudagrass tolerance to salt stress. This result was in line with findings of Zhang et al (2015) and Xing et al (2019), who reported that physiological integration protected the subsequent ramets from high alkaline and salt stress, respectively, along with the evident costs of their supporting ramets. The negative effects of physiological integration on donor ramets have also been reported in other stress conditions (Wang et al, 2009).…”

Section: Discussionsupporting

confidence: 92%

“…It was documented that there was no translocation of Na + among ramets (Sugiura & Takahashi, 2021), whereas stolons before growing up to ramets experienced Na + translocation in Zoysia matrella (Sugiura et al, 2017). However, recent studies on an amphibious plant, Paspalum paspaloides , showed that translocation of Na + to other ramets was important for sharing salt injury (Xing et al, 2019). In our experiments, we did not detect significant Na + content differences between unstressed ramets with severed and interconnected stolons, indicating no Na + transferring to adjoining ramets through stolons.…”

Section: Discussionmentioning

confidence: 99%

“…Ramets located in favorable conditions can serve as a donor, supporting recipient ramets suffering from stress (Li et al, 2011). Physiological integration is reported to facilitate the performance of ramets located in saline habitats (Narvaez‐Ortiz et al, 2018; Sugiura & Takahashi, 2021; Xing et al, 2019). However, only a few studies focused on the effects of physiological integration on the supporting ramets.…”

Section: Introductionmentioning

confidence: 99%

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Physiological integration between Bermudagrass ramets improves overall salt resistance under heterogeneous salt stress

Yin

et al. 2022

Physiologia Plantarum

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Connected ramets of colonal plants often suffer from different environmental conditions such as light, nutrient, and stress. Colonal Bermudagrass (Cynodon dactylon [L.] Pers.) can form interconnected ramets and this connection facilitates the tolerance to abiotic stress, which is a kind of physiological integration. However, how bermudagrass responds to heterogeneously distributed salt stress needs to be further elucidated. Here, we demonstrated that severance of stolons aggravated the damage of salt‐stressed ramets, displaying higher relative electrolytic leakage (EL), lower content of chlorophyll, higher accumulation of Na+, and serious oxidative damages. This finding implied the positive effects of the physiological integration of bermudagrass on salt tolerance. The unstressed ramets connected with the stressed one were mildly injured, implying the supporting and sacrifice function of the unstressed ramets. Physiological integration did not mediate the translocation of Na+ among ramets, but induced a higher expression of salt overly sensitive (SOS) genes in the stressed ramets, consequently reducing the accumulation of Na+ in leaves and roots. In addition, physiological integration upregulated the genes expression and enzymes activity of catalase (CAT) and peroxidase (POD) in both stressed and unstressed ramets. This granted a stronger antioxidant ability of the whole clonal plants under salt stress. Enhanced Na+ transfer and increased reactive oxygen species (ROS) scavenging are mechanisms that likely contribute to the physiological integration leading to the salt tolerance of bermudagrass.

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Small islands of safety promote the performance of a clonal plant in cadmium-contaminated soil

et al. 2023

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Effects of salinity and clonal integration on the amphibious plantPaspalum paspaloides: growth, photosynthesis and tissue ion regulation

Cited by 14 publications

References 47 publications

Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

Effects of salinity and temperature on tuber sprouting and growth of Schoenoplectus nipponicus

Physiological integration between Bermudagrass ramets improves overall salt resistance under heterogeneous salt stress

Small islands of safety promote the performance of a clonal plant in cadmium-contaminated soil

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