Impact of drought stress on photosynthetic response, leaf water potential, and stem sap flow in two cultivars of bi-leader apple trees (Malus × domestica Borkh.)
By N. Bhusal, Su-Gon Han, T. Yoon. Scientia Horticulturae, 2019
150 citations recorded by the source corpus.
ABSTRACT Photosynthetic responses and water relation of two apple cultivars, Hongro (medium-maturing) and Fuji (late-maturing), grafted on a single M.9 rootstock, were examined under drought stress conditions. Experimental bi-leader trees were grown in the field and were either well-irrigated or subjected to drought stress for 60 d. The photosynthetic responses and water relation parameters differed between the two cultivars. The net photosynthetic rate (Pn) in Hongro began to decrease at 15 d of drought treatment, while in Fuji this reduction occurred approximately 5 d later. Similarly, the Hongro cultivar in drought treatment showed a higher reduction in midday leaf water potential (ΨMD), stem sap flow, and hydraulic conductance (Ks) because of greater reduction of xylem vessel area, vessel density, and vessel diameter as compared to those in Fuji. As the ΨMD and stem sap flow decreased in drought stress treatment, the abscisic acid concentration in xylem sap increased; the increase was higher in Hongro than in Fuji. The changes in leaf morphological traits and reduction in total chlorophyll content were lower in Fuji than in Hongro. These results demonstrated that Fuji exhibited greater tolerance to water stress compared with Hongro.
Subfields: Global and Planetary Change, Plant Science
View Paper: https://www.semanticscholar.org/paper/13dc7324a195e7b3398f3f34950f362b662a66f1
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
- Nabil I. Elsheery
- Minsu Lee
- A. Han
- M. Helaly
- Areum Han
- H. El-Hoseiny
- Hyunseok Kim
- S. Alam-Eldein
Citations in the corpus
- Zinc Oxide and Silicone Nanoparticles to Improve the Resistance Mechanism and Annual Productivity of Salt-Stressed Mango Trees (2020, background): “Drought reduces the morphological and physiological characteristics of the plant and alternates the xylem anatomical features, leading to a reduction in growth rate [66].”
- Responses to drought stress in Prunus sargentii and Larix kaempferi seedlings using morphological and physiological parameters (2020, result): “Moreover, compared to Japanese larch, leaves of Sargent cherry had a higher reduction of leaf water potential under drought, inhibiting the biosynthesis of chloroplast proteins and resulting in a higher reduction of photosynthesis (Bhusal et al., 2019; Jo et al., 2019).”