The influence of the moss layer on soil structure and water retention is not well understood. Therefore, this study aims to investigate changes in under reveal influencing factors these changes. 3D networks macropores were quantified using CT scanning image analysis techniques, characteristics explored through curves (SWRCs) VG model. length densities thin thick layers approximately 2.7 1.6 tim...

Levels of (+)-abscisic acid present in the long-day plant spinach (Spinacia oleracea L., cv. Savoy Hybrid 612) grown under different photoperiodic regimes were measured in purified extracts by optical rotary dispersion. When plants were transferred from short to long days, the abscisic acid content increased 2- to 3-fold. This rise in the level of abscisic acid took place during the 1st long da...

Phaseic acid (PA) and dihydrophaseic acid (DPA) are the major metabolites observed when (S)-2-(14)C-abscisic acid (ABA) is fed to 14-day excised primary bean leaves (Phaseolus vulgaris L. cv. Red Kidney). The distribution of (14)C in leaves which were wilted after feeding ABA appears to be the same as that observed in unwilted leaves. A reduction in the relative specific radioactivities of the ...

It was discovered in a Palestine orchard that citrus trees do not necessarily wilt when the trunk is cut from opposite sides at different levels so that every vessel is severed (2). Similar observations have been made on several other species Qf trees (3). Furthermore, it is known that every transpiration column throughout the cross section of a tall grapevine can be broken by air, without reta...

Ralstonia solanacearum is the causal agent of the devastating bacterial wilt disease, which colonizes susceptible Medicago truncatula via the intact root tip. Infection involves four steps: appearance of root tip symptoms, root tip cortical cell invasion, vessel colonization, and foliar wilting. We examined this pathosystem by in vitro inoculation of intact roots of susceptible or resistant M. ...