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Regulatory control of carotenoid accumulation in winter squash during storage
Year:
2014
Source of publication :
Planta
Authors :
Tadmor, Yaakov
;
.
Volume :
240
Co-Authors:
Zhang, M.K., College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China, Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Zhang, M.P., College of Life Science, Shanxi Normal University, Linfen, Shanxi, China, Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Mazourek, M., Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Tadmor, Y., Newe Ya’ar Research Center, ARO, PO Box 1021, Ramat Yishay, Israel
Li, L., Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Facilitators :
From page:
1063
To page:
1074
(
Total pages:
12
)
Abstract:
Main conclusion: Storage promotes carotenoid accumulation and converts amylochromoplasts into chromoplasts in winter squash. Such carotenoid enhancement is likely due to continuous biosynthesis along with reduced turnover and/or enhanced sequestration.Postharvest storage of fruits and vegetables is often required and frequently results in nutritional quality change. In this study, we investigated carotenoid storage plastids, carotenoid content, and its regulation during 3-month storage of winter squash butternut fruits. We showed that storage improved visual appearance of fruit flesh color from light to dark orange, and promoted continuous accumulation of carotenoids during the first 2-month storage. Such an increased carotenoid accumulation was found to be concomitant with starch breakdown, resulting in the conversion of amylochromoplasts into chromoplasts. The butternut fruits contained predominantly β-carotene, lutein, and violaxanthin. Increased ratios of β-carotene and violaxanthin to total carotenoids were noticed during the storage. Analysis of carotenoid metabolic gene expression and PSY protein level revealed a decreased expression of carotenogenic genes and PSY protein following the storage, indicating that the increased carotenoid level might not be due to increased biosynthesis. Instead, the increase likely resulted from a continuous biosynthesis with a possibly reduced turnover and/or enhanced sequestration, suggesting a complex regulation of carotenoid accumulation during fruit storage. This study provides important information to our understanding of carotenogenesis and its regulation during postharvest storage of fruits. © 2014, Springer-Verlag Berlin Heidelberg.
Note:
Related Files :
biosynthesis
carotenoids
color
Cucurbita
Cucurbita moschata
food storage
gene expression
Genetics
metabolism
Show More
Related Content
More details
DOI :
10.1007/s00425-014-2147-6
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28054
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:36
Scientific Publication
Regulatory control of carotenoid accumulation in winter squash during storage
240
Zhang, M.K., College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China, Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Zhang, M.P., College of Life Science, Shanxi Normal University, Linfen, Shanxi, China, Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Mazourek, M., Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Tadmor, Y., Newe Ya’ar Research Center, ARO, PO Box 1021, Ramat Yishay, Israel
Li, L., Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States, Department of Plant Breeding and Genetics, Cornell University, Ithaca, NY, United States
Regulatory control of carotenoid accumulation in winter squash during storage
Main conclusion: Storage promotes carotenoid accumulation and converts amylochromoplasts into chromoplasts in winter squash. Such carotenoid enhancement is likely due to continuous biosynthesis along with reduced turnover and/or enhanced sequestration.Postharvest storage of fruits and vegetables is often required and frequently results in nutritional quality change. In this study, we investigated carotenoid storage plastids, carotenoid content, and its regulation during 3-month storage of winter squash butternut fruits. We showed that storage improved visual appearance of fruit flesh color from light to dark orange, and promoted continuous accumulation of carotenoids during the first 2-month storage. Such an increased carotenoid accumulation was found to be concomitant with starch breakdown, resulting in the conversion of amylochromoplasts into chromoplasts. The butternut fruits contained predominantly β-carotene, lutein, and violaxanthin. Increased ratios of β-carotene and violaxanthin to total carotenoids were noticed during the storage. Analysis of carotenoid metabolic gene expression and PSY protein level revealed a decreased expression of carotenogenic genes and PSY protein following the storage, indicating that the increased carotenoid level might not be due to increased biosynthesis. Instead, the increase likely resulted from a continuous biosynthesis with a possibly reduced turnover and/or enhanced sequestration, suggesting a complex regulation of carotenoid accumulation during fruit storage. This study provides important information to our understanding of carotenogenesis and its regulation during postharvest storage of fruits. © 2014, Springer-Verlag Berlin Heidelberg.
Scientific Publication
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