Soil moisture and leaf water potential mathods
Answers
Explanation:
Leaf Water Potential
Leaf water potential (LWP) indicates the whole plant water status, and maintenance of high LWP is found to be associated with dehydration avoidance mechanisms. Gaosegelwe and Kirkham (1990) have suggested that LWP might be used as an easy and fast way to screen sorghum genotypes for drought avoidance. Before flowering, plants avoid dehydration largely by maintaining higher LWP, whereas after flowering, plants avoid dehydration by maintaining higher turgor at a given level of moisture stress (Rosenow et al., 1983). Leaf firing is considered as a simple phenotypic trait that allows large populations to be screened (Andrews et al., 1983). Stomatal conductance (SC) and leaf rolling have been found to be reliable physiological indicators of drought tolerance (Kadioglu and Terzi, 2007) and associated with LWP (Bittman and Simpson, 1989). Leaf rolling enhances stomatal closure by increasing leaf resistance to water loss (Amelework et al., 2015) and reduces leaf temperature and loss of water by decreasing incident radiation (Heckathorn and DeLucia, 1991). In the tolerant durra genotype, IS22330 in particular, the regulation of stomatal openings was strongly related to NADP-malic enzyme expression (Fracasso et al., 2016). Under relatively mild stress, delayed leaf rolling may be associated with sustained plant growth and production. However, under severe drought and heat stress conditions, greater leaf rolling may be associated with better chances for recovery when moisture stress is relieved (Blum et al., 1992). Under conditions where it is difficult to measure transpiration efficiency and SC, leaf rolling is a good indicator of drought tolerance (Amelework et al., 2015).
hope it is useful....
The influence of greasewood on soil maisture penetration and soil chemistry ... differential pollen. accumulation in water tank sediments and adjacent soils lored. represention of arboreal pollen when compared with surface soil samples adjacent