אסיף מאגר המחקר החקלאי

Genetics of flavonoid, carotenoid, and chlorophyll pigments in melon fruit rinds

Year:

2010

Source of publication :

Authors :

Volume :

58

Co-Authors:

Tadmor, Y., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Burger, J., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Yaakov, I., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Feder, A., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Libhaber, S.E., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Portnoy, V., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Meir, A., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Tzuri, G., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Sa'Ar, U., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Rogachev, I., Weizmann Institute of Science, Rehovot 76100, Israel
Aharoni, A., Weizmann Institute of Science, Rehovot 76100, Israel
Abeliovich, H., Faculty of Agriculture, Food and Environmental Sciences, Hebrew University of Jerusalem, Rehovot 76100, Israel
Schaffer, A.A., Volcani Center, ARO, P.O. Box 6, Bet-Dagan 50250, Israel
Lewinsohn, E., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel
Katzir, N., Newe Yaar Research Center, ARO, P.O. Box 1021, Ramat Yishay 30095, Israel

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Abstract:

External color has profound effects on acceptability of agricultural products by consumers. Carotenoids and chlorophylls are known to be the major pigments of melon (Cucumis melo L.) rinds. Flavonoids (especially chalcones and anthocyanins) are also prominent in other fruits but have not been reported to occur in melons fruit. We analyzed the pigments accumulating in rinds of different melon genotypes during fruit development. We found that melon rind color is based on different combinations of chlorophyll, carotenoids, and flavonoids according to the cultivar tested and their ratios changed during fruit maturation. Moreover, in "canary yellow" type melons, naringenin chalcone, a yellow flavonoid pigment previously unknown to occur in melons, has been identified as the major fruit colorant in mature rinds. Naringenin chalcone is also prominent in other melon types, occurring together with carotenoids (mainly β-carotene) and chlorophyll. Both chlorophyll and carotenoid pigments segregate jointly in an F2 population originating from a cross between a yellow canary line and a line with green rind. In contrast, the content of naringenin chalcone segregates as a monogenic trait independently to carotenoids and chlorophyll. Transcription patterns of key structural phenylpropanoid and flavonoid biosynthetic pathway genes were monitored in attempts to explain naringenin chalcone accumulation in melon rinds. The transcript levels of CHI were low in both parental lines, but C4H, C4L, and CHS transcripts were upregulated in "Noy Amid", the parental line that accumulates naringenin chalcone. Our results indicate that naringenin chalcone accumulates independently from carotenoids and chlorophyll pigments in melon rinds and gives an insight into the molecular mechanism for the accumulation of naringenin chalcone in melon rinds. © 2010 American Chemical Society.

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