Effects of temperature and salinity on Ruppia sinensis seed germination, seedling establishment, and seedling growth

Gu, Ruiting; Zhou, Yi; Song, Xiaoling; Xu, Shaojie; Zhang, Xiaomei; Lin, Haiying; Xu, Shuai; Zhu, Shuyu

doi:10.1016/j.marpolbul.2017.08.013

Cited by 26 publications

(24 citation statements)

References 51 publications

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“…All of the storage treatments had greater seed vigor levels than the control groups (seed storage at salinity 10 psu and room temperature). The highest seed germination percentage after wet storage for 9 months was 95.70 ± 1.17%, which was obviously higher than the initial germination percentage (73.08 ± 0.90%) under the same germination conditions without storage ( Gu et al, 2017 ) ( Figure 9 ). Moreover, the seed vigor levels in most of storage treatments were similar at 0 and 4°C.…”

Section: Resultsmentioning

confidence: 85%

“… Ruppia sinensis seed vigor after storage for 9 months (Black bars) in dry conditions at different temperatures and in wet conditions at 0°C and 30 psu. The white bar represents initial seed germination percentage before the storage ( Gu et al, 2017 ). Different letters a, b, and c indicate significant difference between treatments.…”

Section: Resultsmentioning

confidence: 99%

“…The seed vigor was tested through the germination experiment. To test germination, each seed treatment was kept in 150 mL glass beakers containing artificial seawater at a salinity of 5 psu in a light incubator at 30°C with a light irradiance at 70 μE m -2 s -1 and a 12:12 h light: dark photoperiod ( Gu et al, 2017 ). Seeds where the cotyledon emerged were considered germinated seeds ( Koch and Seeliger, 1988 ).…”

Section: Methodsmentioning

confidence: 99%

“…So far, little is known about the seed ecology of this species. Our recent work indicated that salinity and temperature can significantly affect the germination rates of R. sinensis seeds ( Gu et al, 2017 ). The latest national survey in China showed that the population distribution of this species has been decreasing.…”

Section: Introductionmentioning

confidence: 99%

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Tolerance of Ruppia sinensis Seeds to Desiccation, Low Temperature, and High Salinity With Special Reference to Long-Term Seed Storage

Zhou

Song

et al. 2018

Front. Plant Sci.

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Seeds are important materials for the restoration of globally-threatened marine angiosperm (seagrass) populations. In this study, we investigated the differences between different Ruppia sinensis seed types and developed two feasible long-term R. sinensis seed storage methods. The ability of R. sinensis seeds to tolerate the short-term desiccation and extreme cold had been investigated. The tolerance of R. sinensis seeds to long-term exposure of high salinity, cold temperature, and desiccation had been considered as potential methods for long-term seed storage. Also, three morphological and nine physiological indices were measured and compared between two types of seeds: Shape L and Shape S. We found that: (1) wet storage at a salinity of 30–40 psu and 0°C were the optimal long-term storage conditions, and the proportion of viable seeds reached over 90% after a storage period of 11 months since the seeds were collected from the reproductive shoots; (2) dry condition was not the optimal choice for long-term storage of R. sinensis seeds; however, storing seeds in a dry condition at 5°C and 33 ± 10% relative humidity for 9 months had a relatively high percentage (74.44 ± 2.22%) of viable seeds, consequently desiccation exposure could also be an acceptable seed storage method; (3) R. sinensis seeds would lose vigor in the interaction of extreme cold (-27°C) and desiccation; (4) there were significant differences in seed weight, seed curvature, and endocarp thickness between the two types of seeds. These findings provided fundamental physiological information for R. sinensis seeds and supported the long-term storage of its seeds. Our results may also serve as useful reference for seed storage of other threatened seagrass species and facilitate their ex situ conservation and habitat restoration.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tolerance of Ruppia sinensis Seeds to Desiccation, Low Temperature, and High Salinity With Special Reference to Long-Term Seed Storage

Zhou

Song

et al. 2018

Front. Plant Sci.

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“…The complexity of this topic dictates a combination of laboratory studies and real-world experiments (e.g. Gu et al (2017); Pereda-Briones et al (2017) ). While seagrass restoration has been a topic of research for several decades, the mixed success of restoration projects, and changing environmental conditions, show that there is still much to learn.…”

Section: Management and Restorationmentioning

confidence: 99%

Towards recognition of seagrasses, and their sustainable management

Keulen

Nordlund

Cullen-Unsworth

2018

Marine Pollution Bulletin

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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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Effects of temperature and salinity on Ruppia sinensis seed germination, seedling establishment, and seedling growth

Cited by 26 publications

References 51 publications

Tolerance of Ruppia sinensis Seeds to Desiccation, Low Temperature, and High Salinity With Special Reference to Long-Term Seed Storage

Tolerance of Ruppia sinensis Seeds to Desiccation, Low Temperature, and High Salinity With Special Reference to Long-Term Seed Storage

Towards recognition of seagrasses, and their sustainable management

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

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