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Seed sojourn and fast viability loss constrain seedling production of a prominent riparian protection plant Salix variegata Franch

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ABSTRACT

Salix variegata Franch, a prominent plant applied in riparian shelter vegetation in Three Gorges reservoir region of China, produces many seeds every year but generates only a few or no seedlings. Whether the low seedling production of S. variegata is caused by seed sterility or by rapid loss of seed viability remains unknown. We investigated the sojourn time of mature seeds in capsules produced in early, mid, and late reproductive season and the germinability of mature seeds fresh or stored after different period of time. The sojourn time of seeds in capsules was 2.89, 3.95, and 4.72 days in early, mid, and late reproductive season, respectively. The maximal germination percentage of non-stored fresh seeds produced in early, mid, and late reproductive season was 93.33%, 78.67%, and 40%, respectively, which indicates mature seeds were not sterile. The longest viability-retaining time of seeds produced in early, mid, and late reproductive season was only 8, 16, 16 days, respectively, indicating that mature seeds of S. variegata lost viability very rapidly. Mature seeds possessed good viability, but their rapid viability loss caused the low seedling production and hampered the population growth of S. variegata in the riparian area of Three Gorges reservoir region.

No MeSH data available.


Germination rates (mean ± sd) of non-stored fresh Salix variegata seeds produced in early, mid, and late reproductive season (A,B, and C, respectively). The germination of seeds at temperature of 5, 10, 15, 20, and 30 °C were examined respectively.
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f2: Germination rates (mean ± sd) of non-stored fresh Salix variegata seeds produced in early, mid, and late reproductive season (A,B, and C, respectively). The germination of seeds at temperature of 5, 10, 15, 20, and 30 °C were examined respectively.

Mentions: It is found that S. variegata seeds produced in different reproductive seasons had different viability (indicated by germination rate). The seeds produced in October and December exhibited the highest and lowest germination, respectively. The maximal germination rates of seeds produced in October, November, and December were 93.33%, 78.67%, and 40%, respectively (Fig. 2). Furthermore, the results showed that the optimal temperature for germination was dissimilar for seeds produced in different reproductive seasons. Seeds produced in October achieved the largest germination at 30 °C and 20 °C, while seeds produced in November showed the largest germination at 20 °C, and seeds in December tended to have the largest germination at 10 °C (Fig. 2).


Seed sojourn and fast viability loss constrain seedling production of a prominent riparian protection plant Salix variegata Franch
Germination rates (mean ± sd) of non-stored fresh Salix variegata seeds produced in early, mid, and late reproductive season (A,B, and C, respectively). The germination of seeds at temperature of 5, 10, 15, 20, and 30 °C were examined respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5121584&req=5

f2: Germination rates (mean ± sd) of non-stored fresh Salix variegata seeds produced in early, mid, and late reproductive season (A,B, and C, respectively). The germination of seeds at temperature of 5, 10, 15, 20, and 30 °C were examined respectively.
Mentions: It is found that S. variegata seeds produced in different reproductive seasons had different viability (indicated by germination rate). The seeds produced in October and December exhibited the highest and lowest germination, respectively. The maximal germination rates of seeds produced in October, November, and December were 93.33%, 78.67%, and 40%, respectively (Fig. 2). Furthermore, the results showed that the optimal temperature for germination was dissimilar for seeds produced in different reproductive seasons. Seeds produced in October achieved the largest germination at 30 °C and 20 °C, while seeds produced in November showed the largest germination at 20 °C, and seeds in December tended to have the largest germination at 10 °C (Fig. 2).

View Article: PubMed Central - PubMed

ABSTRACT

Salix variegata Franch, a prominent plant applied in riparian shelter vegetation in Three Gorges reservoir region of China, produces many seeds every year but generates only a few or no seedlings. Whether the low seedling production of S. variegata is caused by seed sterility or by rapid loss of seed viability remains unknown. We investigated the sojourn time of mature seeds in capsules produced in early, mid, and late reproductive season and the germinability of mature seeds fresh or stored after different period of time. The sojourn time of seeds in capsules was 2.89, 3.95, and 4.72 days in early, mid, and late reproductive season, respectively. The maximal germination percentage of non-stored fresh seeds produced in early, mid, and late reproductive season was 93.33%, 78.67%, and 40%, respectively, which indicates mature seeds were not sterile. The longest viability-retaining time of seeds produced in early, mid, and late reproductive season was only 8, 16, 16 days, respectively, indicating that mature seeds of S. variegata lost viability very rapidly. Mature seeds possessed good viability, but their rapid viability loss caused the low seedling production and hampered the population growth of S. variegata in the riparian area of Three Gorges reservoir region.

No MeSH data available.