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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

Conceptual model of the distribution of three Caragana species along the precipitation (P) gradient.
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PLV071F5: Conceptual model of the distribution of three Caragana species along the precipitation (P) gradient.

Mentions: Differences in environmental tolerances to temperature, water supply and sand burial depth of seed germination and seedling emergence of the three Caragana species are correlated with the sequential east to west distribution of environmental factors on the Ordos Plateau (Fig. 5). The seed/seedling stage of C. microphylla is least tolerant to aridity and burial, which we suggest plays a role in restricting its distribution primarily to the eastern part of the Ordos Plateau. On the other hand, the seed/seedling stage of C. korshinskii is the most tolerant to aridity and is restricted to the western part of the Plateau. C. intermedia, with moderate tolerance to aridity and sand burial in the seed to seedling stage occurs in the middle of the gradient, between C. microphylla in the east and C. korshinskii in the west. Thus, precipitation amount and sand burial appear to be selective forces that play an important role in the sequential distribution of C. korshinskii, C. intermedia and C. microphylla along the decreasing west to east aridity gradient on the Ordos Plateau. The west to east increase in vegetation cover, decrease in sand burial and increase in amount of precipitation are interrelated with the distribution of the three Caragana species.Figure 5.


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)

Conceptual model of the distribution of three Caragana species along the precipitation (P) gradient.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

PLV071F5: Conceptual model of the distribution of three Caragana species along the precipitation (P) gradient.
Mentions: Differences in environmental tolerances to temperature, water supply and sand burial depth of seed germination and seedling emergence of the three Caragana species are correlated with the sequential east to west distribution of environmental factors on the Ordos Plateau (Fig. 5). The seed/seedling stage of C. microphylla is least tolerant to aridity and burial, which we suggest plays a role in restricting its distribution primarily to the eastern part of the Ordos Plateau. On the other hand, the seed/seedling stage of C. korshinskii is the most tolerant to aridity and is restricted to the western part of the Plateau. C. intermedia, with moderate tolerance to aridity and sand burial in the seed to seedling stage occurs in the middle of the gradient, between C. microphylla in the east and C. korshinskii in the west. Thus, precipitation amount and sand burial appear to be selective forces that play an important role in the sequential distribution of C. korshinskii, C. intermedia and C. microphylla along the decreasing west to east aridity gradient on the Ordos Plateau. The west to east increase in vegetation cover, decrease in sand burial and increase in amount of precipitation are interrelated with the distribution of the three Caragana species.Figure 5.

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