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Pakistan Journal of Biological Sciences
  Year: 2006 | Volume: 9 | Issue: 4 | Page No.: 686-691
DOI: 10.3923/pjbs.2006.686.691
 
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Changes in Glycerolipid and Sterol Contents in Leaves of Borago officinalis L. Plants as Related to Growth and Development

J. Aghofack-Nguemezi and V. Tatchago

Abstract:
Cotyledonary and primary leaves of Borago officinalis L. plants showed a decrease in the contents of phospholipids, monogalactosyldiacylglycerol and digalactosyldiacylglycerol in the course of growth whereas free fatty acids and triacylglycerol contents increased gradually during the experimental period. Changes in sterol composition during the development of both types of leaves indicated a high proportion of free sterols and esterified sterols in comparison with steryl glycosides and acylated steryl glycosides. However, the amounts of free sterols and esterified sterols in cotyledonary leaves decreased with increasing age while in primary leaves they tended to increase when the organs became senescent. These alterations in glycerolipid and sterol levels in senescing leaves were accompanied by a decrease in chlorophyll content and an increase in carotenoid content. These results indicated that primary leaves are better predisposed to reduce the severe effects of senescence on extrachloroplastic membranes than cotyledonary leaves.
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How to cite this article:

J. Aghofack-Nguemezi and V. Tatchago , 2006. Changes in Glycerolipid and Sterol Contents in Leaves of Borago officinalis L. Plants as Related to Growth and Development. Pakistan Journal of Biological Sciences, 9: 686-691.

DOI: 10.3923/pjbs.2006.686.691

URL: https://scialert.net/abstract/?doi=pjbs.2006.686.691

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