Abstract
Organic acid accumulation and their related enzymes in orange fruit were studied in Jingyan orchard.Three navel orange varieties were selected with 'Robertson Navel' orange,'Newhall navel' orange and 'Harvest navel' orange.The activities of citrate synthase(CS),cis-aconitase,phosphoenolpyruvatecarboxylase(PEPC),mito-aconitase,isocitrate dehydrogenase(IDH) and malate dehydrogenase(MDH) were measured.The results showed that the variations of organic acid content in different varieties fruit was mainly determined by organic acid cleavage in mid-and late stage of fruit development.Few differences were observed in the activities of CS,MDH,cis-aconitase,and mito-aconitase of fruit among different varieties orange.However,the activities of IDH and PEPC were significantly varied in different varieties orange from 120 days after full bloom to the fruit ripening,in the different varies.It was suggested that the differences of organic acid content in fruit with different varieties was mainly determined by IDH,and partly by PEPC,but not CS,MDH and mito-aconitase cis-aconitase.Moreover,IDH and PEPC influenced organic acid content in fruit with different varieties by regulating citrate cleavage and the organic acid accumulation during the mid-and late stage of the fruit development,respectively.
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Claims 4
Claim · model-written summary
Activities of CS, MDH, cis-aconitase and mito-aconitase differed little among navel orange varieties.
- Taxon
- Navel Orange
Citrus sinensist0 - Organ / stage
- fruite1
- Outcome
- activities of CS,MDH,cis-aconitase,and mito-aconitasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Navel Orange”
e1“Few differences were observed in the activities of CS,MDH,cis-aconitase,and mito-aconitase of fruit among different varieties orange”
Claim · model-written summary
Activities of IDH and PEPC changed significantly among navel orange varieties from 120 days after full bloom to fruit ripening.
- Taxon
- Navel OrangeCitrus sinensist0
- Organ / stage
- fruite2
- Outcome
- activities of IDH and PEPCe2
- Qualifier
- from 120 days after full bloom to the fruit ripeninge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Navel Orange”
e2“the activities of IDH and PEPC were significantly varied in different varieties orange from 120 days after full bloom to the fruit ripening”
Claim · model-written summary
IDH is suggested to mainly determine, and PEPC partly determine, the organic acid content differences among varieties.
- Taxon
- Navel OrangeCitrus sinensist0
- Gene
- IDHe3
- Outcome
- organic acid content in fruite3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Navel Orange”
e3“It was suggested that the differences of organic acid content in fruit with different varieties was mainly determined by IDH,and partly by PEPC”
Claim · model-written summary
IDH and PEPC influenced fruit organic acid content by regulating citrate cleavage in mid and late fruit development.
- Taxon
- Navel OrangeCitrus sinensist0
- Gene
- IDH and PEPCe4
- Outcome
- organic acid content in fruite4
- Qualifier
- regulating citrate cleavagee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Navel Orange”
e4“IDH and PEPC influenced organic acid content in fruit with different varieties by regulating citrate cleavage and the organic acid accumulation during the mid-and late stage of the fruit development,respectively”