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פותח על ידי קלירמאש פתרונות בע"מ -
Invertases in young and mature leaves of Citrus sinensis
Year:
1986
Source of publication :
Phytochemistry
Authors :
שפר, ארתור
;
.
Volume :
25
Co-Authors:
Schaffer, A.A., Department of Horticulture, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel
Facilitators :
From page:
2275
To page:
2277
(
Total pages:
3
)
Abstract:
The sucrose catabolic enzymes acid invertase (EC 3.2.1.26) and alkaline invertase (EC 3.2.1.27) were studied in young and mature Citrus sinensis leaf tissue. In young, expanding leaves (60 % final length) soluble acid invertase activity predominated, while soluble alkaline invertase activity predominated in mature leaves. The acid and alkaline invertase activities were separated on Sephadex G-200. The acid invertase had an Mr of approximately 60 000, pH maximum of 4.5 and apparent Km of 3.3 mM sucrose. The alkaline invertase had an Mr of approximately 200 000, pH maxima of 6.8 and an apparent Km of 20 mM sucrose. Alkaline invertase was strongly inhibited by 10 mM Tris while acid invertase was not. Possible physiological roles for the two invertases are discussed. © 1986.
Note:
Related Files :
Citrus
Citrus sinensis
Invertase
leaves
Rutaceae
source-sink relationships.
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/S0031-9422(00)81678-7
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
29349
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
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Scientific Publication
Invertases in young and mature leaves of Citrus sinensis
25
Schaffer, A.A., Department of Horticulture, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel
Invertases in young and mature leaves of Citrus sinensis
The sucrose catabolic enzymes acid invertase (EC 3.2.1.26) and alkaline invertase (EC 3.2.1.27) were studied in young and mature Citrus sinensis leaf tissue. In young, expanding leaves (60 % final length) soluble acid invertase activity predominated, while soluble alkaline invertase activity predominated in mature leaves. The acid and alkaline invertase activities were separated on Sephadex G-200. The acid invertase had an Mr of approximately 60 000, pH maximum of 4.5 and apparent Km of 3.3 mM sucrose. The alkaline invertase had an Mr of approximately 200 000, pH maxima of 6.8 and an apparent Km of 20 mM sucrose. Alkaline invertase was strongly inhibited by 10 mM Tris while acid invertase was not. Possible physiological roles for the two invertases are discussed. © 1986.
Scientific Publication
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