precedingw or following irrigations. No reduction in the rate of photosynthesis was cletected as soil moisture was extracted, until the approximate time the first visible signs of wilting appeared. As the severity of wilting increased, the photosynthetic rate declined rapidly. When the plants were (listinctly wilted, photosynthetic activity had been reduced to approximately 75 % of its maximum ...

Limiting the transpiration rate (TR) of a plant under high vapor pressure deficit (VPD) has the potential to improve crop yield under drought conditions. The effects of elevated VPD on the expression of genes in the leaves of three soybean accessions, Plant Introduction (PI) 416937, PI 471938 and Hutcheson (PI 518664) were investigated because these accessions have contrasting responses to VPD ...

In experimental work on the soil-water relations of plants in the field, it is advantageous to have some knowledge of the water-holding characteristics of the soil before the field trials are started. If the moisture equivalents or the field capacities and the permanent wilting percentages are known, an irrigation program for the various plots can be laid out in advance, with assurance that the...

Thirty lactating Holstein Friesian cows were used in a three treatment randomised block design experiment to investigate the influence of degree of grass wilting prior to ensiling on animal performance and energy utilisation. The three forage treatments were produced from perennial ryegrass swards either ensiled directly or mown, conditioned, spread and tedded to ensure rapid wilting, and ensil...

The effects of wilting on the fate of proline and on the rates of nonprotein proline formation and utilization have been determined in excised bean leaves. Wilting did not alter the fate of exogenously added (14)C-l-proline (2 mm) in either non-starved leaves (from plants previously in the light) or starved leaves (from plants previously in the dark). The fate of proline in nonstarved leaves wa...

Wilting is a common symptom in plants responding to drought stress. Early wilting detection is of high importance for crop precision management. However, it is challenging to develop a reliable measurement technology. This study presents a sensing method based on three-dimensional (3D) images that are generated by a laser scanner. A leaf wilting index (LWI2DFT) is defined from the spectrum of a...

Pathogenic effects of 6 Fusarium spp., viz., F. equiseti, F. longipes, F. scirpi (Section Gibbosum), F. oxysporum (Section Elegans), F. pallidoroseum (Section Arthrosporiella) and F. solani (Section Martiella) were studied on sunflower plants. Symptoms produced by Fusarium spp., were root-, collar-, stemand seedling rots, damping-off, stunting, wilting, tip burning and reduction in growth. Wilt...