, facilitating the maintenance of cell turgor and cell growth under drought stress ( Blake et al., 1991 ; Saito and Terashima, 2004 ). Continuing leaf expansion and maintaining turgid leaves under drought stress are highly desirable traits for improving crop
parallel decreases in Ψ w , Ψ p , RWC, and g S point out that the partial stomatal closure was the result of the leaf water deficit, which caused a loss of turgor. Flooding also decreased A CO2 most in VL/V/SO. The positive relationship between A CO2
maintained turgor by rapidly closing stomata and reducing transpirational water loss. Although s-ABA effectively delays drought-induced wilting in a variety of floriculture crops, applications can result in leaf abscission and senescence symptoms that reduce
loss, specific leaf area (SLA), and leaf wax content (LWC), as well as root length. Materials and Methods Plant material and growth conditions. Sods of zoysiagrass (cv. Diomand) and kentucky bluegrass (cv. Excursion II) were obtained from the research
pot rim to the top growth point, or leaf apex of the longest leaf. The shoots of all plants were severed at the substrate surface, and fresh weight was recorded immediately. Leaf area of all plants was determined using LI-3100C area meter (LI
potential (ψ leaf ), ( E ) leaf osmotic potential (ψ s ), ( F ) leaf ψ s at full turgor (ψ s100 ), ( G ) concentration of abscisic acid in the xylem sap ([ABA] xylem ), and ( H ) stomatal conductance ( g s ) of pot-grown strawberry plants during 16 d after
resulting from reduced meristem activity and/or insufficient turgor pressure for cell expansion ( Lambers et al., 2008 ; van Volkenburgh, 1999 ). Although this may lower whole plant water loss by limiting evaporative surface area, it may also reduce whole
immediate effect in reducing transpirational water loss, restricted leaf expansion minimizes plant water use by limiting increases in transpirational area. In addition to these functions in leaves, ABA plays an important regulatory role in root systems. Root
, Cambridge, U.K.). The water potential components of leaves were measured psychrometrically on the same date of the stomatal resistance measurements using a dew-point psychrometer (WP4; Decagon Devices, Pullman, WA). Leaf water potential (Ψ w ) was measured
amount of CO 2 diffusing through stomata into the leaves, thus slowing down carbon fixation. Limitation of g S (thereby increased leaf stomatal resistance to transpirational water loss) could be one of the reasons that plants had lower E when grown in