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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Potato steroidal glycoalkaloids: Biosynthesis and genetic manipulation
Year:
2009
Source of publication :
Potato Research
Authors :
גינזברג, עידית
;
.
Volume :
52
Co-Authors:
Ginzberg, I., Institute of Plant Sciences, ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Tokuhisa, J.G., Department of Horticulture, Virginia Polytechnic Institute, State University, Blacksburg, VA 24061, United States
Veilleux, R.E., Department of Horticulture, Virginia Polytechnic Institute, State University, Blacksburg, VA 24061, United States
Facilitators :
From page:
1
To page:
15
(
Total pages:
15
)
Abstract:
The potato steroidal glycoalkaloids (SGAs) are important components of plant resistance against pests and pathogens but can be toxic to humans at high levels. SGAs derive their toxicity from anticholinesterase activity affecting the central nervous system and the disruptive effects on cell membrane integrity affecting the digestive system and other organs. Accordingly, current safety regulations limit their content in the edible tuber to 20 mg per 100 g fresh weight. SGA composition and level are genetically determined, with unfavourable growth conditions and inappropriate postharvest management inducing the accumulation of SGAs at levels in the tubers of "safe" cultivars beyond the maximum level set by the industry. Hence, genetic alteration of potato to prevent toxic levels of SGAs in tubers is highly desirable. At the same time, maintaining high SGA levels in other plant organs will contribute to plant resistance against pathogen and pest attacks. To this end, SGA biosynthesis and degradation should be manipulated precisely to exploit tissue-specific expression rather than whole-plant suppression of SGA production, to produce potato cultivars with SGA content enriched in the foliage but diminished in the edible tubers. Only a few details are known about the SGA biosynthetic pathway, its genes and intermediates. Research on factors that regulate SGA biosynthesis and catabolism as well as searches for genetic markers linked to total and specific SGA levels have only recently been pursued. The present review summarizes current data on these issues to encourage further discussion on SGA manipulation for safer food products. © 2008 EAPR.
Note:
Related Files :
Chaconine
Diversity
Leptines
solanine
Solanum tuberosum
Tuber (truffle)
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s11540-008-9103-4
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
סקירה
;
.
Language:
אנגלית
Editors' remarks:
ID:
27204
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:29
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Scientific Publication
Potato steroidal glycoalkaloids: Biosynthesis and genetic manipulation
52
Ginzberg, I., Institute of Plant Sciences, ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Tokuhisa, J.G., Department of Horticulture, Virginia Polytechnic Institute, State University, Blacksburg, VA 24061, United States
Veilleux, R.E., Department of Horticulture, Virginia Polytechnic Institute, State University, Blacksburg, VA 24061, United States
Potato steroidal glycoalkaloids: Biosynthesis and genetic manipulation
The potato steroidal glycoalkaloids (SGAs) are important components of plant resistance against pests and pathogens but can be toxic to humans at high levels. SGAs derive their toxicity from anticholinesterase activity affecting the central nervous system and the disruptive effects on cell membrane integrity affecting the digestive system and other organs. Accordingly, current safety regulations limit their content in the edible tuber to 20 mg per 100 g fresh weight. SGA composition and level are genetically determined, with unfavourable growth conditions and inappropriate postharvest management inducing the accumulation of SGAs at levels in the tubers of "safe" cultivars beyond the maximum level set by the industry. Hence, genetic alteration of potato to prevent toxic levels of SGAs in tubers is highly desirable. At the same time, maintaining high SGA levels in other plant organs will contribute to plant resistance against pathogen and pest attacks. To this end, SGA biosynthesis and degradation should be manipulated precisely to exploit tissue-specific expression rather than whole-plant suppression of SGA production, to produce potato cultivars with SGA content enriched in the foliage but diminished in the edible tubers. Only a few details are known about the SGA biosynthetic pathway, its genes and intermediates. Research on factors that regulate SGA biosynthesis and catabolism as well as searches for genetic markers linked to total and specific SGA levels have only recently been pursued. The present review summarizes current data on these issues to encourage further discussion on SGA manipulation for safer food products. © 2008 EAPR.
Scientific Publication
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