Fruit Photosynthesis

Blanke, Michael

doi:10.1007/978-94-011-3953-3_888

Cited by 73 publications

(103 citation statements)

References 4 publications

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“…The calculation of enzyme activities in sweet-pepper fruit plastids on the basis of the protein content allows the determination of valid data as we checked by SDS-PAGE that ± in contrast to leaf chloroplasts ± pepper fruit chloroplasts do not possess Rubisco as a major protein (data not shown). The observation that Rubisco is present in only low concentrations is in concurrence with the situation in other fruit chloroplasts (Blanke and Lenz 1989).…”

Section: Resultsmentioning

confidence: 81%

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Sweet pepper plastids: enzymic equipment, characterisation of the plastidic oxidative pentose-phosphate pathway, and transport of phosphorylated intermediates across the envelope membrane

Thom

Möhlmann

Quick

et al. 1998

Planta

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Section: Resultsmentioning

confidence: 81%

“…Plastids located in this type of tissue ful®l several important functions. For example, fruit chloroplasts contribute substantially to crop yield by performing CO 2 ®xation and starch biosynthesis (Blanke and Lenz 1989;Batz et al 1995). In addition, Planta (1998) (Camara et al 1995;Quick and Neuhaus 1997).…”

mentioning

confidence: 97%

Sweet pepper plastids: enzymic equipment, characterisation of the plastidic oxidative pentose-phosphate pathway, and transport of phosphorylated intermediates across the envelope membrane

Thom

Möhlmann

Quick

et al. 1998

Planta

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“…An additional function for PEPCase during early development of tomato fruit may be to recapture respiratory CO 2 and thereby to reduce CO 2 losses that amount to 25% of the carbon imported into the fruit during the rapid growth phase (Ho 1996). This role has been suggested for PEPCase in various tissues, including fruit (Laval-Martin et al 1977;Latzko and Kelly 1983;Blanke and Lenz 1989;Law and Plaxton 1995).…”

Section: A Tomato Pepcase Is Speci®cally Expressed In the Fruitmentioning

confidence: 93%

“…Several reviews also suggest the involvement of PEPCase during later stages of fruit development (Chollet et al 1996). The ripening-associated respiratory crisis that occurs in climacteric fruits leads to massive losses of CO 2 that may be re-®xed into malate through PEPCase (Latzko and Kelly 1983;Blanke and Lenz 1989). However, experimental evidence that would support this hypothesis is lacking.…”

Section: Introductionmentioning

confidence: 96%

A fruit-specific phospho enol pyruvate carboxylase is related to rapid growth of tomato fruit

Guillet

Just

Bénard

et al. 2002

Planta

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Malic and citric acids accumulate in cherry tomato (Lycopersicon esculentum Mill.) fruit during the period of rapid growth, from the end of cell division to the onset of ripening. The involvement of phospho enolpyruvate carboxylase (PEPCase, EC 4.1.1.31) in organic acid accumulation and tomato fruit development was investigated. Two PEPCases, named LYCes;Ppc1 and LYCes;Ppc2 and mapped to chromosomes 12 and 7, respectively, were shown to be differentially expressed during tomato fruit development. LYCes;Ppc1 mRNA was present in all fruit tissues and in all other plant organs examined. In contrast, LYCes;Ppc2 was strongly and specifically expressed in fruit from the end of cell division to ripening. No LYCes;Ppc2 expression was detected by northern blot in other plant tissues. In fruit, the increase in LYCes;Ppc2 mRNA was closely followed by an increase in fruit PEPCase protein and activity, and was coincident with the increased accumulation of malate and citrate during the initial period of rapid growth rate, from 8 to 20 days post anthesis. Localization of LYCes;Ppc2 mRNA in young tomato fruit by in situ hybridization revealed that LYCes;Ppc2 is preferentially expressed in large cells of the pericarp and in enlarging cells of the gel surrounding the seeds. Examination of the kinetic and regulatory properties of the PEPCases of growing and ripening fruit further showed that PEPCase in growing fruit is less sensitive to low pH and malate inhibition, indicating a high phosphorylation state and/or the presence of a PEPCase isoform with these characteristics. Taken together, these results indicate that in developing tomato fruit PEPCase is probably important in permitting the synthesis of organic acids to provide the turgor pressure necessary for cell expansion.

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“…Photosynthesis can be measured in petioles, green flowers, calyces, green fruits, cones, stem tissues and even roots. There is no doubt that photosynthesis of green tissues other than the leaf mesophyll will positively contribute to the overall carbon budget of plants (Weiss et al 1988;Blanke and Lenz 1989;Hetherington 1997). It is not only herbaceous or gramineous plants which have special greenish tissues; woody species also contain chlorophyll in several plant parts.…”

Section: Introductionmentioning

confidence: 99%

Ecology and ecophysiology of tree stems: corticular and wood photosynthesis

Pfanz

Aschan

Langenfeld-Heyser

et al. 2002

Naturwissenschaften

248

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Below the outer peridermal or rhytidomal layers, most stems of woody plants possess greenish tissues. These chlorophyll-containing tissues (the chlorenchymes) within the stems are able to use the stem internal CO2 and the light penetrating the rhytidome to photoassimilate and produce sugars and starch. Although net photosynthetic uptake of CO2 is rarely found, stem internal re-fixation of CO2 in young twigs and branches may compensate for 60-90% of the potential respiratory carbon loss. Isolated chlorenchymal tissues reveal rather high rates of net photosynthesis (being up to 75% of the respective rates for leaf photosynthesis). Corticular photosynthesis is thus thought to be an effective mechanism for recapturing respiratory carbon dioxide before it diffuses out of the stem. Furthermore, chloroplasts of the proper wood or pith fraction also take part in stem internal photosynthesis. Although there has been no strong experimental evidence until now, we suggest that the oxygen evolved during wood or pith photosynthesis may play a decisive role in avoiding/reducing stem internal anaerobiosis.

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Fruit Photosynthesis

Cited by 73 publications

References 4 publications

Sweet pepper plastids: enzymic equipment, characterisation of the plastidic oxidative pentose-phosphate pathway, and transport of phosphorylated intermediates across the envelope membrane

Sweet pepper plastids: enzymic equipment, characterisation of the plastidic oxidative pentose-phosphate pathway, and transport of phosphorylated intermediates across the envelope membrane

A fruit-specific phospho enol pyruvate carboxylase is related to rapid growth of tomato fruit

Ecology and ecophysiology of tree stems: corticular and wood photosynthesis

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