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Distribution of three congeneric shrub species along an aridity gradient is related to seed germination and seedling emergence.

Lai L, Tian Y, Wang Y, Zhao X, Jiang L, Baskin JM, Baskin CC, Zheng Y - AoB Plants (2015)

Bottom Line: Under the same treatments, seedling emergence percentages of C. korshinskii were higher than those of the other two species.The rank order of tolerance to drought and sand burial of the three species is C. korshinskii > C. intermedia > C. microphylla.The amount of precipitation and sand burial depth appear to be the main selective forces responsible for the geographical distribution of these species.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Resource Plants, Beijing Botanical Garden, West China Subalpine Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China.

No MeSH data available.


Related in: MedlinePlus

Final germination percentages and rates (mean ± SE, n = 5) of three Caragana species under different temperatures and WPs. Error bars above (below) the data points are the LSD values at P = 0.05, and no error bar means not significant (P > 0.05).
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PLV071F2: Final germination percentages and rates (mean ± SE, n = 5) of three Caragana species under different temperatures and WPs. Error bars above (below) the data points are the LSD values at P = 0.05, and no error bar means not significant (P > 0.05).

Mentions: Temperature, WP and their interactions significantly affected FGP and GR in all three species (Table 1). At the same WP, FGP was significantly higher at 15, 20 and 25 °C than at the other two temperatures, while GR decreased with temperature (P < 0.05, Fig. 2). Final germination percentage increased as WP decreased from 0 to −0.2 MPa at all five temperatures (except for C. microphylla seeds at 25 °C). The WP at which FGP began to decrease and at which it approached 0 % varied among species and temperatures. A WP of −1.0 MPa had a less negative effect on germination percentages of C. korshinskii than on the other two species. At 20 and 25 °C, nearly 30 % of the C. korshinskii seeds germinated at −1.4 MPa, while no seeds of C. intermedia or C. microphylla germinated at this WP (Fig. 2).Figure 2.


Distribution of three congeneric shrub species along an aridity gradient is related to seed germination and seedling emergence.

Lai L, Tian Y, Wang Y, Zhao X, Jiang L, Baskin JM, Baskin CC, Zheng Y - AoB Plants (2015)

Final germination percentages and rates (mean ± SE, n = 5) of three Caragana species under different temperatures and WPs. Error bars above (below) the data points are the LSD values at P = 0.05, and no error bar means not significant (P > 0.05).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4522037&req=5

PLV071F2: Final germination percentages and rates (mean ± SE, n = 5) of three Caragana species under different temperatures and WPs. Error bars above (below) the data points are the LSD values at P = 0.05, and no error bar means not significant (P > 0.05).
Mentions: Temperature, WP and their interactions significantly affected FGP and GR in all three species (Table 1). At the same WP, FGP was significantly higher at 15, 20 and 25 °C than at the other two temperatures, while GR decreased with temperature (P < 0.05, Fig. 2). Final germination percentage increased as WP decreased from 0 to −0.2 MPa at all five temperatures (except for C. microphylla seeds at 25 °C). The WP at which FGP began to decrease and at which it approached 0 % varied among species and temperatures. A WP of −1.0 MPa had a less negative effect on germination percentages of C. korshinskii than on the other two species. At 20 and 25 °C, nearly 30 % of the C. korshinskii seeds germinated at −1.4 MPa, while no seeds of C. intermedia or C. microphylla germinated at this WP (Fig. 2).Figure 2.

Bottom Line: Under the same treatments, seedling emergence percentages of C. korshinskii were higher than those of the other two species.The rank order of tolerance to drought and sand burial of the three species is C. korshinskii > C. intermedia > C. microphylla.The amount of precipitation and sand burial depth appear to be the main selective forces responsible for the geographical distribution of these species.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Resource Plants, Beijing Botanical Garden, West China Subalpine Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China.

No MeSH data available.


Related in: MedlinePlus