Patterns in Size-Related Variations in Current-Year Shoot Structure in Eight Deciduous Tree Species

Yagi, Takanobu; Kikuzawa, Kihachiro

doi:10.1007/pl00013862

Cited by 35 publications

(53 citation statements)

References 21 publications

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“…Accordingly, J. curcas adapt to low light availability by growing toward the light to maintain photosynthesis. The higher leaf display index and leaf area ratio in January 2011 in shade-grown J. curcas indicated resource allocation for optimizing light interception (Yagi & Kikuzawa 1999;Yagi 2000). Matos et al (2009) showed that J. curcas grown in shade had higher leaf area and leaf chlorophyll content.…”

Section: Discussionmentioning

confidence: 99%

“…These morphological indices show the distribution of foliage in the plant crown and the optimization of biomass allocation among stems, roots, and leaves (Yagi & Kikuzawa 1999;Yagi 2000;Souza et al 2009). The distribution of foliage also indicates how the plant uses available resources and adjusts to stresses such as drought and shade.…”

Section: Shoot-foliage Relationshipsmentioning

confidence: 99%

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Combined effects of low light and water stress on Jatropha curcas L. promotes shoot growth and morphological adjustment

2015

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Jatropha curcas (physic nut) is a plant with economic and pharmaceutical uses. Basic studies on the influence of environmental factors on the early development of J. curcas are important for improving farming techniques and increasing productivity. This study investigated the adjustments of J. curcas to the environmental factors of drought and light stress in order to determine which factors most strongly affect the allocation of biomass during early growth. Leaves, stems, and roots of young plants were sampled and leaf area was measured during January and June in 2011. Plants of J. curcas that were grown in shade and subjected to water stress showed higher biomass allocation to aerial parts (mainly stems), which can be explained as a strategy for maximizing carbon assimilation. The pattern of biomass allocation between aerial components and the root system changed in plants grown in shade. During June 2011, biomass in shade-grown J. curcas was preferentially allocated to stems, indicating long-term adjustment. The lower biomass allocation to the root system suggests reduced exploitation of soil water even when this resource is scarce. Thus, over the long term, growth of J. curcas may be compromised by the combined effects of light stress and water deficit.

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Section: Discussionmentioning

confidence: 99%

Section: Shoot-foliage Relationshipsmentioning

confidence: 99%

Combined effects of low light and water stress on Jatropha curcas L. promotes shoot growth and morphological adjustment

2015

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“…On the one hand, since only thick twigs can physically and physiologically support large leaf area and mass, stem diameter of a twig (but not stem length) is positively correlated with both individual leaf size and total leaf area supported by the twig (White 1983a(White , 1983bAckerly and Donoghue 1998;Brouat et al 1998;Preston and Ackerly 2003;Westoby and Wright 2003;Sun et al 2006;Yang et al 2009). Previous studies have shown that leaf number per unit stem length decreases with increasing stem length of currentyear shoots, both intraspecifically and interspecifically (Yagi and Kikuzawa 1999;Yagi 2000), and that leaf number per unit twig mass decreases with increasing twig size . Thus, considering the positive correlation between stem length and stem diameter in whole plants, we can expect that stem diameter and stem length would be pos-itively correlated with leaf size but negatively associated with leaf number per stem mass or length across species within twigs.…”

Section: Introductionmentioning

confidence: 99%

Stem Architectural Effect on Leaf Size, Leaf Number, and Leaf Mass Fraction in Plant Twigs of Woody Species

Fang

Sun³

2009

International Journal of Plant Sciences

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This study is to examine the effect of stem architecture on biomass allocation between leaf and stem and between leaf size and number in plant twigs of woody species. We investigated leaf size, leaf number, stem length, stem diameter, and mass for 282 woody species of subtropical evergreen broad-leaved forests in southwest China. Both stem diameter and stem length were positively correlated with individual leaf mass and area but were negatively associated with leaf number per unit stem mass and leaf number per stem length. This suggests that these stem architecture traits can be a physiological mechanism underlying the leaf size versus leaf number tradeoff. The ratio of stem length to stem diameter (LDR) was negatively correlated with leaf size and leaf number per stem length, due to the difference in the strength of the effects of stem length and stem diameter on leaf size and leaf number. Similarly, both stem diameter and stem length were positively correlated with leaf mass and stem mass. LDR was negatively correlated with leaf biomass fraction (the ratio of leaf mass to twig mass), due to the difference in the strength of the effect of stem length and stem diameter on leaf mass and stem mass. This indicates that stem architecture can significantly influence biomass allocation between leaf and stem. These relationships were generally strong when expressed as correlated evolutionary divergences. In addition, LDR was generally larger in the high-rainfall habitat than in the low-rainfall site. Accordingly, LDR can be regarded as a functional trait and an important component of the leading dimension of leaf size-twig size spectrum in plants.

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“…Measurements of biomass allocations to shoots and leaves followed the methodologies described by Yagi & Kikuzawa (1999), Yagi (2000), and Souza et al (2009b) and were used to identify patterns of biomass allocation and resource optimization within the crowns of species with contrasting leaf phenologies.…”

Section: Shoot-foliage Relationshipsmentioning

confidence: 99%

Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies

Santos¹,

Consolaro²,

Moreno³

et al. 2012

Braz. J. Bot.

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-(Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies). Structural differences between cerrado species with different leaf phenologies are linked to crown architecture, leaf production, and biomass allocation to shoots and leaves. The present study characterized crown structures and the patterns of biomass allocation to leaves and shoots in two woody cerrado species with contrasting leaf phenologies and quantifi ed the irradiance reaching their leaves to determine the best period during the day for photosynthetic activity. The shoots and leaves of fi ve individuals of both Annona coriacea (deciduous) and Hymenaea stigonocarpa (evergreen) were collected along a 50 m transect in a cerrado fragment within the urban perimeter of Catalão -GO, to determine their patterns of biomass allocation in their crowns. The evergreen H. stigonocarpa had signifi cantly higher mean values of shoot inclination (SI), petiole length (PL), leaf area (LA), leaf display index (LDI), and individual leaf area per shoot (ILA), while the deciduous species A. coriacea had signifi cantly higher leaf numbers (LN). The more complex crown of H. stigonocarpa had shoots in more erect positions (orthotropic), with intense self-shading within shoots; A. coriacea, on the other hand, had slanting (plagiotropic) shoots in the crown, allowing similar irradiance levels to all leaf surfaces. The production of plagiotropic shoots by the deciduous species (A. coriacea) is a strategy that enables its use of incident sunlight early in the morning and preventing excessive water loss or excessive irradiance. Hymenaea stigonocarpa (an evergreen), by contrast, had orthotropic shoots and uses intense self-shading as a strategy to avoid excessive irradiance, especially at midday. Differences in crown architectures between evergreen and deciduous species of cerrado sensu stricto can therefore be viewed as adaptations to the environmental light regime.

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Patterns in Size-Related Variations in Current-Year Shoot Structure in Eight Deciduous Tree Species

Cited by 35 publications

References 21 publications

Combined effects of low light and water stress on Jatropha curcas L. promotes shoot growth and morphological adjustment

Combined effects of low light and water stress on Jatropha curcas L. promotes shoot growth and morphological adjustment

Stem Architectural Effect on Leaf Size, Leaf Number, and Leaf Mass Fraction in Plant Twigs of Woody Species

Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies

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