RESOURCE ALLOCATION ON DWARF SHOOTS OF BIRCH (<i>BETULA PENDULA</i>): REPRODUCTION AND LEAF GROWTH

Tuomi, Juha; Niemelä, Pekka; Mannila, Rauno

doi:10.1111/j.1469-8137.1982.tb03326.x

Cited by 62 publications

(32 citation statements)

References 9 publications

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“…A current-year shoot of a tree is regarded as a fundamental unit in reproduction (Lovett Doust and Lovett Doust 1988;Tuomi et al 1982;Newell 1991). Several studies have been conducted to investigate the role of current-year shoots in the reproduction of trees (Tuomi et al 1982;Hoffmann and Alliende 1984;Cooper and McGraw 1988;Karlsson et al 1996;Obeso 1997;Hasegawa and Takeda 2001;Henriksson 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have been conducted to investigate the role of current-year shoots in the reproduction of trees (Tuomi et al 1982;Hoffmann and Alliende 1984;Cooper and McGraw 1988;Karlsson et al 1996;Obeso 1997;Hasegawa and Takeda 2001;Henriksson 2001). These studies are based on the assumption that the current-year shoot is resource-autonomous (Tuomi et al 1988a(Tuomi et al , 1988bSprugel et al 1991).…”

Section: Introductionmentioning

confidence: 99%

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Carbon autonomy of reproductive shoots of Siberian alder ( Alnus hirsuta var. sibirica )

Hasegawa

Koba

Tayasu

et al. 2003

Journal of Plant Research

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Carbon autonomy of current-year shoots in flowering, and of current-year shoots plus 1-year-old shoots (1-year-old shoot system) in fruiting of Siberian alder (Alnus hirsuta var. sibirica) was investigated using a stable isotope of carbon, (13)C. The current-year shoot and 1-year-old shoot systems were fed (13)CO(2) and the atom% excess of (13)C in flowers and fruits was determined. The majority of photosynthate allocated to flower buds was originally assimilated in the leaves of the flowering current-year shoots. Of all the current-year shoots on fruiting 1-year-old shoots, only those nearest to the fruits allocated the assimilated photosynthate to fruit maturation. These results indicate that the current-year shoots and 1-year-old shoot systems are carbon-autonomous units for producing flowers and maturing fruits, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon autonomy of reproductive shoots of Siberian alder ( Alnus hirsuta var. sibirica )

Hasegawa

Koba

Tayasu

et al. 2003

Journal of Plant Research

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“…Also source-sink relationships may create within-tree variation. For example, birch inflorescences function as strong sinks, and draw nitrogen and assimilated carbon from nearby leaves, influencing their characters (Caesar & MacDonald 1983;Tuomi et al 1982). Movement of nutrients and hormones may also be restricted (Watson 1986).…”

Section: Discussionmentioning

confidence: 99%

Within-tree variability of mountain birch leaves causes variation in performance for Epirrita autumnata larvae

Suomela

1996

Vegetatio

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Within-tree variability in leaf characteristics of the mountain birch (Betula pubescens ssp. tortuosa) was bioassayed for the autumnal moth (Epirrita autumnata) by rearing larvae on birch leaves in a laboratory and measuring their growth, consumption rate, approximate digestibility, efficiency of conversion of ingested food and efficiency of conversion of digested food. Only short shoot leaves, i.e. leaves of the same age, were used. The highest hierarchical level, which included trees and ramets within trees, accounted for most of the total variance in almost all the measured traits. Short shoots (within branches) accounted for more of the variance than branches (within trees/ramets) in most of the traits. The results suggest that differences in leaf quality were reflected in larval growth mainly by differences in food utilization efficiencies (postingestive effects) and less by differences in consumption rate (preingestive effects). The observed within-tree variation is probably a consequence of the modular structure, sectoriality and partial functional independence of tree parts.

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“…A tree is an assemblage of current-year shoots (White 1979;Maillette 1982a,b), and a current-year shoot is regarded as a fundamental unit in reproduction (Tuomi et al 1982;Newell 1991). The current-year and 1-year-old shoots were found to be carbon-autonomous units in the production of flowers and in maturation of fruits (Hasegawa et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Current-year shoot based approach for annual variation in the reproductive output in Siberian alder (Alnus hirsuta var. sibirica)

Hasegawa

Takeda

2004

Trees

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Siberian alder (Alnus hirsuta var. sibirica) shows annual variation in reproductive output. However, this phenomenon has not been explained by hypotheses proposed in previous studies. In this study, we constructed a matrix model of current-year shoot dynamics to estimate and compare the reproductive output of current-year shoot population with or without annual variation, and explained the annual variation of reproductive output in terms of a reproductive strategy of the current-year shoot population of Siberian alder. The current-year shoot population of Siberian alder was divided into three functional groups: reproductive, maintenance, and explorative shoot sub-populations. A transition matrix was calculated from the relationships between 1-year-old shoots and the current-year shoots on them. The dynamics of the currentyear shoot population was simulated using the estimated matrix on the patterns with or without annual variation in reproductive output. The pattern with annual variation in reproductive output yielded more reproductive currentyear shoots than the pattern with high reproductive output every year. The annual variation of reproductive output may well be regarded as a reproductive strategy of current-year shoots to increase lifetime fecundity.

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RESOURCE ALLOCATION ON DWARF SHOOTS OF BIRCH (BETULA PENDULA): REPRODUCTION AND LEAF GROWTH

Cited by 62 publications

References 9 publications

Carbon autonomy of reproductive shoots of Siberian alder ( Alnus hirsuta var. sibirica )

Carbon autonomy of reproductive shoots of Siberian alder ( Alnus hirsuta var. sibirica )

Within-tree variability of mountain birch leaves causes variation in performance for Epirrita autumnata larvae

Current-year shoot based approach for annual variation in the reproductive output in Siberian alder (Alnus hirsuta var. sibirica)

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