Quantitative analysis of carbon balance for reproduction in woody species

Ogawa, Kazuharu

doi:10.1007/s10265-002-0054-6

Cited by 6 publications

(4 citation statements)

References 15 publications

(35 reference statements)

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“…Therefore, woody plants are divided into three groups, in which CO 2 release by dark respiration is less than, equal to, or greater than CO 2 refixation by photosynthesis, depending on the size of the reproductive organ. According to the analysis, the net respiration changed from positive to negative at final dry mass (w) ϭ 0.481 g as w decreased (Ogawa, 2002). The average fruit dry mass for E. japonica at the final stage was 0.072 g, much smaller than the estimated threshold (w ϭ 0.481 g), and developing fruits of E. japonica are green.…”

Section: Discussionmentioning

confidence: 97%

“…Furthermore, photosynthesis in fruits may contribute to their carbon requirements, thereby potentially reducing the relative cost of fruit production. Ogawa (2002) estimated the carbon balance in reproductive organs for 20 woody species over the entire reproductive period. He showed that the relationship between net respiration and dry-mass growth was formulated by a linear function with a negative y-intercept.…”

Section: Discussionmentioning

confidence: 99%

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Reproductive investment in male and female Eurya japonica (Theaceae) at tree and branch levels

Suzuki

2005

American J of Botany

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Intersexual differences in reproductive investments (RIs) (dry mass of reproductive tissue) at tree and branch levels in Eurya japonica were examined during two successive years. Mean total RIs per tree for males and females (adjusted for the mean trunk diameter in the combined sample trees, 25.7 mm) were 3.47 and 5.67 g dry mass. Females generally allocated about 1.6 times more biomass per tree to reproduction than males. On the other hand, male total RI per terminal branch averaged 51.6 mg dry mass and female averaged 226.6 mg. Females generally allocated about 4.4 times more biomass per terminal branch to reproduction than males. Thus, the magnitude of sexual difference at the tree level was much lower than that at the branch level. There were negative correlations between interyear fluctuation of total RI and stem diameter for both sexes. Interyear fluctuation of RI was greater for females than males in all size categories. This study revealed that conclusions from tree measures of RI differed from branch measures and suggested the importance of evaluating the average RI at the tree level for woody plants. I discussed the importance in adopting an effective sampling strategy for evaluating the RI at the tree level.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Reproductive investment in male and female Eurya japonica (Theaceae) at tree and branch levels

Suzuki

2005

American J of Botany

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“…Published studies of CO 2 exchange have concentrated on detached fruit (Ogawa 2002), but to our knowledge, there are no reports describing the temporal patterns of CO 2 exchange over the whole reproductive process. Moreover, very few studies have examined CO 2 exchange in the reproductive organs of tropical woody species (e.g.…”

Section: Introductionmentioning

confidence: 88%

Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus

et al. 2005

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The daily variations in the in situ CO(2) exchange of the reproductive organs of Durio zibethinus trees, growing in an experimental field at University Putra Malaysia (UPM), were examined at different growth stages. Reproductive organs emerged on the leafless portions of branches inside the crown. The photon flux densities (PFD) in the chambers used for the measurements were less than 100 mumol m(-2) s(-1) and were 40% of the PFD outside of the crown. The daytime net respiration rate and the nighttime dark respiration rate were higher at the time of flower initiation and during the mixed stages, when flower buds, flowers, and fruit coexist, than at the flower bud stage. The net respiration rate was lower than the daytime dark respiration rate at given temperatures, especially at the flower bud and fruit stages. Conversely, the net respiration rate was similar to the daytime dark respiration rate at the mixed stage. Photosynthetic CO(2) refixation reduced the daily respiratory loss by 17, 5, 0.3, and 24% at the flower bud, flower initiation, mixed, and fruit stages, respectively.

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“…Using the compartment model for estimating carbon balance in a reproductive organ (Ogawa 2002(Ogawa , 2004, daily net translocation into an organ (DTr, mg dw organ -1 day -1 ) (Hozumi and Kurachi 1991) was calculated as follows:…”

Section: Estimation Of Carbon Balance In Fruits and Leavesmentioning

confidence: 99%

Quantitative analysis of carbon balance in the reproductive organs and leaves of Cinnamomum camphora (L.) Presl

Imai

Ogawa

2009

J Plant Res

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We investigated seasonal changes in dry mass and CO(2) exchange rate in fruit and leaves of the evergreen tree Cinnamomum camphora with the aim of quantitatively determining the translocation balance between the two organs. The fruit dry mass growth peaked in both August and October: the first increase was due to fruit pulp development and the second to seed development. Fruit respiration also increased with the rapid increase in fruit dry mass. Therefore, the carbohydrates required for fruit development showed two peaks during the reproductive period. Fruit photosynthesis was relatively high in early August, when fruit potentially re-fixed 75% of respired CO(2), indicating that fruit photosynthesis contributed 15-35% of the carbon requirement for fruit respiration. Current-year leaves completed their growth in June when fruit growth began. Current-year leaves translocated carbohydrates at a rate of approximately 10-25 mg dry weight (dw) leaf(-1) day(-1) into other organs throughout the entire fruit growth period. This rate of translocation from current-year leaves was much higher than the amount of carbohydrate required for reproduction (ca. 3 mg dw fruit(-1) day(-1)). Given the carbon balance between fruit and current-year leaves, carbohydrates for reproduction were produced within the current-year fruit-bearing shoots. C. camphora would be adaptive for steadily supplying enough amount of carbohydrate to the fruits, as there was little competition for carbohydrates between the two organs. As assimilates by leaves are used for processes such as reproduction and the formation of new shoots, photosynthesis by reproductive organs is considered to be important to compensate for reproductive cost.

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Quantitative analysis of carbon balance for reproduction in woody species

Cited by 6 publications

References 15 publications

Reproductive investment in male and female Eurya japonica (Theaceae) at tree and branch levels

Reproductive investment in male and female Eurya japonica (Theaceae) at tree and branch levels

Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus

Quantitative analysis of carbon balance in the reproductive organs and leaves of Cinnamomum camphora (L.) Presl

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