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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 emergence percentage (mean ± SE, n = 5) of three Caragana species under different sand burial depths and watering regimes at 15 : 25 °C. Other abbreviations are the same as in Fig. 2.
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PLV071F3: Final emergence percentage (mean ± SE, n = 5) of three Caragana species under different sand burial depths and watering regimes at 15 : 25 °C. Other abbreviations are the same as in Fig. 2.

Mentions: Burial depth, water supply regime and their interactions had significant effects on both FEP and ER for all three species (Table 1). In general, seeds of neither species germinated on the sand surface. Further, only a very few seedlings emerged from a burial depth of 6 cm, regardless of water supply regime (Fig. 3), and no seedlings emerged from any depth in the 2.5 mm water supply treatment. Final emergence percentage was highest under sand burial depths of 0.5–3 cm. With increased burial depth, FEP decreased, and a higher amount of water was needed for seedling emergence. The sigmoidal curve was used to fit the relationship between water supply and FEP [R2 ranged from 0.94 to 0.99 for C. korshinskii, df (2, 5), P < 0.001; from 0.90 to 0.99 for C. intermedia, df (2, 5), P < 0.05; from 0.95 to 0.97 for C. microphylla, df (2, 5), P < 0.001]. The curves showed that FEP would reach the maximum under proper water supply (Fig. 3).Figure 3.


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 emergence percentage (mean ± SE, n = 5) of three Caragana species under different sand burial depths and watering regimes at 15 : 25 °C. Other abbreviations are the same as in Fig. 2.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

PLV071F3: Final emergence percentage (mean ± SE, n = 5) of three Caragana species under different sand burial depths and watering regimes at 15 : 25 °C. Other abbreviations are the same as in Fig. 2.
Mentions: Burial depth, water supply regime and their interactions had significant effects on both FEP and ER for all three species (Table 1). In general, seeds of neither species germinated on the sand surface. Further, only a very few seedlings emerged from a burial depth of 6 cm, regardless of water supply regime (Fig. 3), and no seedlings emerged from any depth in the 2.5 mm water supply treatment. Final emergence percentage was highest under sand burial depths of 0.5–3 cm. With increased burial depth, FEP decreased, and a higher amount of water was needed for seedling emergence. The sigmoidal curve was used to fit the relationship between water supply and FEP [R2 ranged from 0.94 to 0.99 for C. korshinskii, df (2, 5), P < 0.001; from 0.90 to 0.99 for C. intermedia, df (2, 5), P < 0.05; from 0.95 to 0.97 for C. microphylla, df (2, 5), P < 0.001]. The curves showed that FEP would reach the maximum under proper water supply (Fig. 3).Figure 3.

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