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Leaf lifespan is positively correlated with periods of leaf production and reproduction in 49 herb and shrub species.

Lan Li F, Liu X, Bao WK - Ecol Evol (2016)

Bottom Line: We concluded that leaf life span is associated not simply with the dynamics of the leaf itself but with reproduction period.The results demonstrate a plant trade-off in resource allocation between production and reproduction and a coordinated arrangement of leaves, flowers, and fruits in their time investment.Our results provide insight into the relationship between leaf life span and plant phenology.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China.

ABSTRACT
Leaf life span and plant phenology are central elements in strategies for plant carbon gain and nutrient conservation. Although few studies have found that leaf life span correlate with the patterns of leaf dynamics and reproductive output, but there have not been sufficient conclusive tests for relationships between leaf life span and plant phenological traits, the forms and strengths of such relationships are poorly understood. This study was conducted with 49 herb and shrub species collected from the eastern portion of the Tibetan Plateau and grown together in a common garden setting. We investigated leaf life span, the periods of leaf production and death, the time lag between leaf production and death, and the period of plant reproduction (i.e., flowering and fruiting). Interspecific relationships of leaf life span with leaf dynamics and reproduction period were determined. Leaf production period was far longer than leaf death period and largely reflected the interspecific variation of leaf life span. Moreover, leaf life span was positively correlated with the length of reproduction (i.e., flowering and fruiting) period. These relationships were generally consistent across different subgroups of species (herbs vs. shrubs) and indicate potentially widely applicable relationships between LLS and aboveground phenology. We concluded that leaf life span is associated not simply with the dynamics of the leaf itself but with reproduction period. The results demonstrate a plant trade-off in resource allocation between production and reproduction and a coordinated arrangement of leaves, flowers, and fruits in their time investment. Our results provide insight into the relationship between leaf life span and plant phenology.

No MeSH data available.


Conceptual model describing leaf dynamics through the growing season. Each letter represents a key phenological date as follows: A, first leaf production; B, last leaf production; C, first leaf death; D, last leaf death. E and F, theoretical total leaf number. Dotted lines represent the end of the period of leaf production [BE] and end of period of leaf death [DF]. Solid lines link the cumulative number of leaves produced [AE] or lost [CF] through time. LP is the period of leaf production (solid arrow), LD is the period of leaf death (dashed arrow) and L is the time lag between the end of leaf production and the start of leaf death (dashed and dotted arrow).
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ece32147-fig-0001: Conceptual model describing leaf dynamics through the growing season. Each letter represents a key phenological date as follows: A, first leaf production; B, last leaf production; C, first leaf death; D, last leaf death. E and F, theoretical total leaf number. Dotted lines represent the end of the period of leaf production [BE] and end of period of leaf death [DF]. Solid lines link the cumulative number of leaves produced [AE] or lost [CF] through time. LP is the period of leaf production (solid arrow), LD is the period of leaf death (dashed arrow) and L is the time lag between the end of leaf production and the start of leaf death (dashed and dotted arrow).

Mentions: We observed an extensive overlap between LP and LD (Fig. 1), with LP much longer than LD (Table 1). LLS was much longer for the shrub group than for the annual herbs (P < 0.001, F = 17.29), whereas perennial herbs and subshrub species were intermediate and did not differ significantly from the other plant forms (P > 0.05, one‐way ANOVA).


Leaf lifespan is positively correlated with periods of leaf production and reproduction in 49 herb and shrub species.

Lan Li F, Liu X, Bao WK - Ecol Evol (2016)

Conceptual model describing leaf dynamics through the growing season. Each letter represents a key phenological date as follows: A, first leaf production; B, last leaf production; C, first leaf death; D, last leaf death. E and F, theoretical total leaf number. Dotted lines represent the end of the period of leaf production [BE] and end of period of leaf death [DF]. Solid lines link the cumulative number of leaves produced [AE] or lost [CF] through time. LP is the period of leaf production (solid arrow), LD is the period of leaf death (dashed arrow) and L is the time lag between the end of leaf production and the start of leaf death (dashed and dotted arrow).
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4933094&req=5

ece32147-fig-0001: Conceptual model describing leaf dynamics through the growing season. Each letter represents a key phenological date as follows: A, first leaf production; B, last leaf production; C, first leaf death; D, last leaf death. E and F, theoretical total leaf number. Dotted lines represent the end of the period of leaf production [BE] and end of period of leaf death [DF]. Solid lines link the cumulative number of leaves produced [AE] or lost [CF] through time. LP is the period of leaf production (solid arrow), LD is the period of leaf death (dashed arrow) and L is the time lag between the end of leaf production and the start of leaf death (dashed and dotted arrow).
Mentions: We observed an extensive overlap between LP and LD (Fig. 1), with LP much longer than LD (Table 1). LLS was much longer for the shrub group than for the annual herbs (P < 0.001, F = 17.29), whereas perennial herbs and subshrub species were intermediate and did not differ significantly from the other plant forms (P > 0.05, one‐way ANOVA).

Bottom Line: We concluded that leaf life span is associated not simply with the dynamics of the leaf itself but with reproduction period.The results demonstrate a plant trade-off in resource allocation between production and reproduction and a coordinated arrangement of leaves, flowers, and fruits in their time investment.Our results provide insight into the relationship between leaf life span and plant phenology.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China.

ABSTRACT
Leaf life span and plant phenology are central elements in strategies for plant carbon gain and nutrient conservation. Although few studies have found that leaf life span correlate with the patterns of leaf dynamics and reproductive output, but there have not been sufficient conclusive tests for relationships between leaf life span and plant phenological traits, the forms and strengths of such relationships are poorly understood. This study was conducted with 49 herb and shrub species collected from the eastern portion of the Tibetan Plateau and grown together in a common garden setting. We investigated leaf life span, the periods of leaf production and death, the time lag between leaf production and death, and the period of plant reproduction (i.e., flowering and fruiting). Interspecific relationships of leaf life span with leaf dynamics and reproduction period were determined. Leaf production period was far longer than leaf death period and largely reflected the interspecific variation of leaf life span. Moreover, leaf life span was positively correlated with the length of reproduction (i.e., flowering and fruiting) period. These relationships were generally consistent across different subgroups of species (herbs vs. shrubs) and indicate potentially widely applicable relationships between LLS and aboveground phenology. We concluded that leaf life span is associated not simply with the dynamics of the leaf itself but with reproduction period. The results demonstrate a plant trade-off in resource allocation between production and reproduction and a coordinated arrangement of leaves, flowers, and fruits in their time investment. Our results provide insight into the relationship between leaf life span and plant phenology.

No MeSH data available.