Threshold response of stomatal closing ability to leaf abscisic acid concentration during growth

Abstract

SummaryLeaf abscisic acid concentration mediates the growth environment-induced effects on both the control of water loss during desiccation and the restoration of water uptake upon re-watering.

Role of guard-cell ABA in determining maximal stomatal aperture and prompt vapor-pressure-deficit response

“…6F). This is in agreement with previous studies that have shown that VPD conditions (1 to 4 days of exposure) affect stomatal aperture (Fanourakis et al , 2011; Aliniaeifard et al , 2014; Carvalho et al , 2015), the quantity of leaf ABA (Rezaei Nejad and van Meeteren, 2008; Arve et al , 2013; Giday et al , 2014) and stomatal sensitivity to ABA (Rezaei Nejad and van Meeteren, 2008; Aliniaeifard and Van Meeteren, 2013; Pantin et al , 2013 b ; Arve et al , 2014; Giday et al , 2014), which is reversed by the application of ABA (Fanourakis et al , 2011; Aliniaeifard et al , 2014) or air movement (Carvalho et al , 2015) during the low-VPD period. Growing GCabi plants under constant low-VPD conditions did not increase their leaf area, despite the observed increase in their RWC (Fig.…”

Low air humidity during cultivation promotes stomatal closure ability in rose

“…Transpiration is not only controlled by stomatal regulation, but also via morphological adaptations. Under conditions that impede water loss, as an increase in RH, plants tend to increase leaf area and decrease leaf thickness in order to offset the decreased transpiration (Giday et al, 2014).…”

Growth in continuous high air humidity increases the expression of CYP707A-genes and inhibits stomatal closure

“…Similarly, after transfer from low to high RH, the ABA content is reduced due to catabolism of ABA into PA (Okamoto et al, 2009). It has also been shown in Rosa x hybrida that the plants need a minimum amount of ABA during development to develop fully functioning stomata (Giday et al, 2014). However, the ABA concentration needed to produce fully functional stomata probably varies between species and possibly also between cultivars.…”