Effect of drought stress on the osmotic adjustment, cell wall elasticity and cell volume of six cultivars of common beans (Phaseolus vulgaris L.)
By J. Martínez, H. Silva, J. Ledent, M. Pinto. 2007
330 citations recorded by the source corpus.
In the southern spring-summer season of 2001-2002 six cultivars (Orfeo, Arroz Tuscola, Barbucho, Coscorron, Pinto and Tortola) of common beans (Phaseolus vulgaris L.) were grown under two frequencies of irrigation in the central zone of Chile. Control plants were irrigated every 7 days and water stress plants were irrigated every 21 days. Leaf water potential (Psi(W)), leaf relative water content (RWC), turgid weight to dry weight ratio (TW/DW), osmotic potential at full turgor ( Psi(100)(S)), osmotic adjustment (OA), elasticity module of the cell wall (epsilon) and cell size of the palisade and spongy tissue were evaluated at 74-76 days after sowing (DAS) in completely developed leaves. Water stressed plants showed lower Psi(W) than in control plants in all the varieties with values that averaged -1.4 and. -0.9 MPa, respectively. According to the Drought Resistance Index (DRI) calculated from field measurements, among the cultivars studied, Orfeo was the most resistant to water stress and Arroz Tuscola, the most susceptible. A close negative relationship between leaf TW/DW and DRI under water stress conditions was observed (r(2) = 0.63). Leaf TW/DW decreased considerably with water stress in cultivar Orfeo (15%) but the decrease was higher in Tortola (22%), and there was also a decrease (although smaller) in Pinto (11%). Arroz Tuscola under stress did not present an important change in TW/DW, but presented one of the highest values of TW/DW. There was a strong negative correlation between DRI and palisade cell size under water stress conditions (r(2) = 0.85) and a strong positive one between palisade cell size and TW/DW (r(2) = 0.86) thus higher DRI was associated with small palisade cell size and small TW/DW. The most resistant cultivar Orfeo did not show a decrease in psi(100)(S) calculated from thepressure-RWC relationships and its resistance was not associated with maintenance of leaf TW/DW under water stress. psi(100)(S) calculated from the pressure-RWC relationships decreased only in the cultivar Coscorron. Cultivar Orfeo showed a strong decrease (35%) of s, in association to a higher cell wall elasticity (CWE) and as consequence maintained better its cell turgescence but this was also the case of Tortola (56%) and Pinto (34%) and to a lesser extent of Barbucho (18%). This was not the case for Arroz Tuscola where epsilon and CWE were not changed. These results suggest that CWE and to a lesser extent leaf TW/DW can be important components of the water stress adaptation mechanism in this specie that could contribute to the higher resistance to water stress of Orfeo compared to Arroz Tuscola. (c) 2006 Elsevier B.V. All rights reserved.
Subfields: Agronomy and Crop Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/f9e59556a8e6856a2366272e33a3564b06e63396
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Agronomy and Crop Science
In Plant Science
Citations in the corpus
- An overview on drought induced changes in plant growth, water relationsand photosynthesis - (2012, background): “Osmotic adjustment (OA) is recognized as an effective component of drought resistance in several crop plants (Ludlow and Muchow, 1990; Kramer and Boyer, 1995; Martiınez et al., 2007).”
- Plant drought stress: effects, mechanisms and management (2011, neutral): “Common beans Reproductive 58–87% Martínez et al. (2007)”
- Drought stress in plants: A review on morphological characteristics and pigments composition (2009, background): “In plants, a better understanding of the morpho-anatomical and physiological basis of changes in water stress resistance could be used to select or create new varieties of crops to obtain a better productivity under water stress conditions (Nam et al., 2001; Martinez et al., 2007).”
- Antioxidant defense responses: physiological plasticity in higher plants under abiotic constraints (2009, background): “The presence of oxygen in the cellular environment represents a constant oxidative threat to cellular structure and process (Pand and Khan 2003; Martinez et al. 2007).”
- Photosynthesis and antioxidative defense mechanisms in deciphering drought stress tolerance of crop plants (2016, background): “Osmotic adjustment is one of the important components of drought resistance in crop plants, this involves accumulation of solutes and thus a decreased osmotic potential as well as increased pressure potential (Martinez et al. 2007).”
- Responses of leaf stomatal density to water status and its relationship with photosynthesis in a grass (2008, background): “The constructive comments from anonymous reviewers are appreciated.”