IntroductionIn the last few years some efforts have been directed to elucidate the influence of suboptimal water levels upon metabolic processes. The level and state of water, serving both as medium and structural component for proteins (13), should bear a marked influence on the structure and activity of enzymes, membranes, and particulates. Hence, it is conceivable that water stress should alter and possibly shift metabolic processes. In this respect contradicting data have been reported regarding the changes which proteins and RNA undergo with developing stress. While Mothes (18) and Gates and Bonner (9) reported a decreasing trend in the levels of proteins and RNA, Kessler (11), West (32), and Kessler and Tishel (12) showed the existence of opposite changes.More detailed data are needed to establish any primary influences of water stress upon cellular activities. It was the aim of this study to gain more information on stress-induced fluctuations of major nitrogen fractions and the free amino acid pool.
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