Carbon relations of fruits of epiphytic orchids

Zotz, Gerhard; Vollrath, Birgit; Schmidt, Gerold

doi:10.1078/0367-2530-00081

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…However, to date, few studies have quantified the importance of internal recycling of respiratory CO 2 in fruit. Zotz et al (2003) estimated that this process reduced C losses in mature fruits of monocotyledonous epiphytic orchids, a kind of capsule with large numbers of seeds, reaching up to 60%, depending on the species. In contrast, under normal conditions, fruit photosynthesis in tomato green berry is unimportant in primary metabolism but plays a considerable role in the initiation of normal programs of seed formation ( Lytovchenko et al , 2011 ).…”

Section: Discussionmentioning

confidence: 99%

The complex character of photosynthesis in cucumber fruit

Sui

Shan

et al. 2017

Journal of Experimental Botany

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Section: Discussionmentioning

confidence: 99%

The complex character of photosynthesis in cucumber fruit

Sui

Shan

et al. 2017

Journal of Experimental Botany

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“…Furthermore, there is evidence that fruits generally possess significant concentrations of cytosolic phosphoenolpyruvate carboxylase (PEPC), which might additionally recycle mitochondrial released CO 2 (Blanke & Lenz 1989). High net assimilation rates of green fruits have been described for tropical epiphytic species (Zotz, Vollrath & Schmidt 2003), which often grow under high light conditions in the upper tree crowns. Cipollini & Levey (1991) argued that photosynthesis of green fruits could offset respiratory costs, but only under good light conditions.…”

Section: Discussionmentioning

confidence: 99%

Fruit‐bearing branchlets are carbon autonomous in mature broad‐leaved temperate forest trees

Hoch

2005

Plant Cell & Environment

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In order to evaluate the degree of carbon autonomy for fruit development, the carbon source-sink relationship in fruit-bearing branchlets of mature deciduous forest trees was manipulated in situ . The tests included half and complete defoliation, girdling or the combination of both treatments, which were applied on fruiting branchlets by using a canopy crane. Concentrations of non-structural carbohydrates (NSC) were analysed in different branchlet tissues and fruits, to identify situations of carbon imbalances induced by the treatments. NSC concentrations of branchlets were generally lower under treatments resulting in decreased fruit growth. All three investigated species ( Carpinus betulus , Fagus sylvatica and Tilia platyphyllos ) exhibited complete carbon autonomy of fruiting at the level of whole, undisturbed branchlets, since neither a decrease of total infructescence biomass, nor of individual fruit mass occurred on girdled, un-defoliated branchlets. On girdled, 100% defoliated branchlets, fruit biomass relative to controls decreased by approximately 50% in Carpinus and Tilia , but by almost 80% in Fagus , which can be explained by different proportions of photosynthetically active infructescence tissues among the species. In contrast to the other two species, Tilia branchlets did not import carbon to compensate for assimilate loss after defoliation.

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“…Finally, other organs of orchids, e.g. petals and sepals (Arditti, 1979), fruits (Lemos Filho and Isaias, 2004;Zotz et al, 2003), or pseudobulbs (Ng and Hew, 2000) may also be photosynthetically active.…”

Section: Introductionmentioning

confidence: 99%