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פותח על ידי קלירמאש פתרונות בע"מ -
Ectopic expression of ORANGE promotes carotenoid accumulation and fruit development in tomato
Year:
2019
Source of publication :
Plant Biotechnology Journal
Authors :
תדמור, יעקב
;
.
Volume :
17
Co-Authors:

Yazdani, M., Sun, Z., Yuan, H., Zeng, S., Thannhauser, T. W., Vrebalov, J., Ma, Q., Xu, Y., Fei, Z., Van Eck, J., Tian, S., Giovannoni, J. J. and Li, L.

Facilitators :
From page:
33
To page:
49
(
Total pages:
17
)
Abstract:

Carotenoids are critically important to plants and humans. The ORANGE (OR) gene is a key regulator for carotenoid accumulation, but its physiological roles in crops remain elusive. In this study, we generated transgenic tomato ectopically overexpressing the Arabidopsis wild‐type OR (AtORWT) and a ‘golden SNP’‐containing OR (AtORHis). We found that AtORHis initiated chromoplast formation in very young fruit and stimulated carotenoid accumulation at all fruit developmental stages, uncoupled from other ripening activities. The elevated levels of carotenoids in the AtOR lines were distributed in the same subplastidial fractions as in wild‐type tomato, indicating an adaptive response of plastids to sequester the increased carotenoids. Microscopic analysis revealed that the plastid sizes were increased in both AtORWT and AtORHis lines at early fruit developmental stages. Moreover, AtOR overexpression promoted early flowering, fruit set and seed production. Ethylene production and the expression of ripening‐associated genes were also significantly increased in the AtOR transgenic fruit at ripening stages. RNA‐Seq transcriptomic profiling highlighted the primary effects of OR overexpression on the genes in the processes related to RNA, protein and signalling in tomato fruit. Taken together, these results expand our understanding of OR in mediating carotenoid accumulation in plants and suggest additional roles of OR in affecting plastid size as well as flower and fruit development, thus making OR a target gene not only for nutritional biofortification of agricultural products but also for alteration of horticultural traits.

Note:
Related Files :
carotenoids
Early flowering
flowering
fruit formation
fruit set
Plastids
Solanum lycopersicum
tomato
עוד תגיות
תוכן קשור
More details
DOI :
doi:10.1111/pbi.12945
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
39516
Last updated date:
02/03/2022 17:27
Creation date:
13/03/2019 08:51
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Scientific Publication
Ectopic expression of ORANGE promotes carotenoid accumulation and fruit development in tomato
17

Yazdani, M., Sun, Z., Yuan, H., Zeng, S., Thannhauser, T. W., Vrebalov, J., Ma, Q., Xu, Y., Fei, Z., Van Eck, J., Tian, S., Giovannoni, J. J. and Li, L.

Ectopic expression of ORANGE promotes carotenoid accumulation and fruit development in tomato

Carotenoids are critically important to plants and humans. The ORANGE (OR) gene is a key regulator for carotenoid accumulation, but its physiological roles in crops remain elusive. In this study, we generated transgenic tomato ectopically overexpressing the Arabidopsis wild‐type OR (AtORWT) and a ‘golden SNP’‐containing OR (AtORHis). We found that AtORHis initiated chromoplast formation in very young fruit and stimulated carotenoid accumulation at all fruit developmental stages, uncoupled from other ripening activities. The elevated levels of carotenoids in the AtOR lines were distributed in the same subplastidial fractions as in wild‐type tomato, indicating an adaptive response of plastids to sequester the increased carotenoids. Microscopic analysis revealed that the plastid sizes were increased in both AtORWT and AtORHis lines at early fruit developmental stages. Moreover, AtOR overexpression promoted early flowering, fruit set and seed production. Ethylene production and the expression of ripening‐associated genes were also significantly increased in the AtOR transgenic fruit at ripening stages. RNA‐Seq transcriptomic profiling highlighted the primary effects of OR overexpression on the genes in the processes related to RNA, protein and signalling in tomato fruit. Taken together, these results expand our understanding of OR in mediating carotenoid accumulation in plants and suggest additional roles of OR in affecting plastid size as well as flower and fruit development, thus making OR a target gene not only for nutritional biofortification of agricultural products but also for alteration of horticultural traits.

Scientific Publication
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