Meda, A., Lamien, C.E., Romito, M., Millogo, J. & Nacoulma, O.G. (2005): Determination of the total phenolic, flavonoid and proline contents in Burkina Fasan honey, as well as their radical scavering activity. Fd Chem. , 91 , 571
Authors:F. Shafiq, S.H. Raza, A. Bibi, I. Khan and M. Iqbal
Mechanisms involved in salt tolerance urge exploration and investigation of genotypic variation to assist future breeding programs. Comparative examination of ten wheat cultivars for salt tolerance and their response towards proline-seed-priming was performed. Exposure of wheat seedlings to salinity resulted in prominent reduction in root and shoot growth attributes of all cultivars. Furthermore, decrease in the chlorophyll contents was evident although this varied among cultivars. Wheat seedlings grown from proline pre-treated seeds exhibited improved photosynthetic pigments, besides this response was also cultivar and concentration dependent. Generally, salt stressed plants exhibited higher antioxidant enzyme activities. Proline priming significantly influenced antioxidant activities, however, its magnitude varied. The peroxidase activity varied among wheat cultivars that were evident from the analysis of POD activity on Native-PAGE gel. Salinity caused the accumulation of Na+ in the roots and the magnitude of Na+ translocation to the shoot was cultivar dependent. Similarly, K+ uptake and its distribution among root and shoot varied. Priming treatments affected ion distribution of Na+ and K+ but inter-cultivar variations were evident. Conclusively, all the cultivars investigated exhibited differential response to salinity and proline seed pre-treatments. However, the proline-priming mediated improvements in growth and antioxidant enzyme activities contributed to stress tolerance which partly relied on the ability of the plant to uptake sodium and its partitioning in the roots. Of the cultivars tested, Faisalabad-08 and Bhakhar-2002 were ranked as relatively salt tolerant and the cvs. AARI-10, MH-97 and Auqab-2000 as relatively salt sensitive.
Authors:V. P. Korolev, O. A. Antonova and N. L. Smirnova
The imino acid proline plays a decisive role in the protection against cell injuries caused by freezing and dehydration in diatoms and several higher plants (see [ 1 , 2 ] and references therein). This also
Authors:R. Umamaheswari, S. Nirmala, P. Sagayaraj and A. Joseph Arul Pragasam
charge transfer is possible. Proline is an abundant amino acid in collagen and is exceptional among the amino acids because it is the only one in which the amine group is part of a pyrrolidine ring making it rigid and directional in biological systems [ 3
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Black , C. A. ( 1973 ): Soil Plant Relationships . Wiley , New Delhi , 792 p.
Cecchini , N. M