Reduced water availability improves drought tolerance of potted miniature roses: Is the ethylene pathway involved?

2004 ◽  
Vol 79 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Lise Andersen ◽  
Michelle Williams ◽  
Margrethe Serek
Keyword(s):  
Drought Tolerance ◽  
Water Availability ◽  
Reduced Water

scholarly journals The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

2020 ◽  
Vol 71 (16) ◽  
pp. 4658-4676 ◽  
Author(s):  
Gregory A Gambetta ◽  
Jose Carlos Herrera ◽  
Silvina Dayer ◽  
Quishuo Feng ◽  
Uri Hochberg ◽  
...  
Keyword(s):  
Climate Change ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Water Availability ◽  
Economic Importance ◽  
Fruit Crop ◽  
Crop Varieties ◽  
Drought Tolerant ◽  
Definition Of ◽  
The Impact

Abstract Water availability is arguably the most important environmental factor limiting crop growth and productivity. Erratic precipitation patterns and increased temperatures resulting from climate change will likely make drought events more frequent in many regions, increasing the demand on freshwater resources and creating major challenges for agriculture. Addressing these challenges through increased irrigation is not always a sustainable solution so there is a growing need to identify and/or breed drought-tolerant crop varieties in order to maintain sustainability in the context of climate change. Grapevine (Vitis vinifera), a major fruit crop of economic importance, has emerged as a model perennial fruit crop for the study of drought tolerance. This review synthesizes the most recent results on grapevine drought responses, the impact of water deficit on fruit yield and composition, and the identification of drought-tolerant varieties. Given the existing gaps in our knowledge of the mechanisms underlying grapevine drought responses, we aim to answer the following question: how can we move towards a more integrative definition of grapevine drought tolerance?

scholarly journals Effects of Drought Frequency on Growth Performance and Transpiration of Young Black Locust (Robinia pseudoacaciaL.)

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Dario Mantovani ◽  
Maik Veste ◽  
Dirk Freese
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Water Use Efficiency ◽  
Growth Performance ◽  
Water Use ◽  
Water Availability ◽  
Black Locust ◽  
Marginal Land ◽  
Drought Tolerant ◽  
Use Efficiency

Black locust (Robinia pseudoacaciaL.) is a drought-tolerant fast growing tree, which could be an alternative to the more common tree species used in short-rotation coppice on marginal land. The plasticity of black locust in the form of ecophysiological and morphological adaptations to drought is an important precondition for its successful growth in such areas. However, adaptation to drought stress is detrimental to primary production. Furthermore, the soil water availability condition of the initial stage of development may have an impact on the tree resilience. We aimed to investigate the effect of drought stress applied during the resprouting on the drought tolerance of the plant, by examining the black locust growth patterns. We exposed young trees in lysimeters to different cycles of drought. The drought memory affected the plant growth performance and its drought tolerance: the plants resprouting under drought conditions were more drought tolerant than the well-watered ones. Black locust tolerates drastic soil water availability variations without altering its water use efficiency (2.57 g L−1), evaluated under drought stress. Due to its constant water use efficiency and the high phenotypic plasticity, black locust could become an important species to be cultivated on marginal land.

Changes in arthropod community but not plant quality benefit a specialist herbivore on plant under reduced water availability

2020 ◽  
Author(s):  
Po-An Lin ◽  
Chia-Ming Liu ◽  
Jia-Ang Ou ◽  
Cheng-Han Sun ◽  
Wen-Po Chuang ◽  
...  
Keyword(s):  
Water Availability ◽  
Pieris Rapae ◽  
Plant Quality ◽  
Physiological Adaptation ◽  
Insect Herbivores ◽  
Specialist Herbivore ◽  
Herbivore Community ◽  
Two Populations ◽  
Reduced Water

AbstractPlants grow under reduced water availability can have divergent effects on insect herbivores, in some instances producing benefits to them. However, the forces mediating these positive impacts remain mostly unclear. We conducted a manipulative field study using a specialist herbivore Pieris rapae, and its host plant, Rorippa indica, in two populations to identify how water availability impacts overall plant quality and multitrophic interactions. We observed that R. indica growing under low water availability led to higher survival of P. rapae larvae. The increase in survival of eggs and larvae was related to the reduced abundance of other herbivores and natural enemies. Water availability had differential impacts on members of the herbivore community through changes in plant quality. Low water availability decreased the quality of R. indica to most herbivores as indicated by reduced abundance in the field and decreased relative growth rate in feeding assays. In contrast, the performance of P. rapae larvae were not affected by differences in sympatric R. indica grown under different water availability. These results indicate that local P. rapae possess some physiological adaptation to overcome fluctuations in host quality. Our findings illustrate that reduced water availability is beneficial to a specialist herbivore, but detrimental to most other herbivores. Our work highlights the complex roles of the arthropod communities associated with plants in determining the impacts of water availability on insect herbivores.

Defining phreatophyte response to reduced water availability: preliminary investigations on the use of xylem cavitation vulnerability in Banksia woodland species

2006 ◽  
Vol 54 (2) ◽  
pp. 173 ◽  
Author(s):  
R. H. Froend ◽  
P. L. Drake
Keyword(s):  
Water Availability ◽  
Tree Mortality ◽  
Water Source ◽  
Resource Planning ◽  
Xylem Cavitation ◽  
Xylem Water Potential ◽  
Critical Thresholds ◽  
Species Response ◽  
Critical Range ◽  
Reduced Water

The consideration of phreatophyte response to changes in water availability is important in identifying ecological water requirements in water-resource planning. Although much is known about water-source partitioning and intra- and interspecific variability in groundwater use by Banksia woodland species, little is known about the response of these species to groundwater draw-down. This paper describes a preliminary study into the use of xylem cavitation vulnerability as a measure of species response to reduced water availability. A response function and critical range in percentage loss of conductance is identified for four Banksia woodland overstorey species. Similarity in the vulnerability curves of B. attenuata R.Br. and B. menziesii R.Br. at low tensions supports the notion that they occupy a similar ecohydrological niche, as defined by their broad distributions relative to depth to groundwater. B. ilicifolia R.Br., however, as an obligate phreatophyte, has a range restricted to environments of higher water availability and shallower depth to groundwater and this is reflected in greater vulnerability to cavitation (relative to other Banksia) at lower tensions. The wetland tree Melaleuca preissiana Schauer generally expressed a greater vulnerability at any given xylem water potential (Ψx). This paper identifies the range in Ψx within which there is an elevated risk of tree mortality, and represents a first step towards quantifying the critical thresholds in the response of Banksia woodland species to reduced water availability.

scholarly journals 2R,3R-Butanediol, a Bacterial Volatile Produced by Pseudomonas chlororaphis O6, Is Involved in Induction of Systemic Tolerance to Drought in Arabidopsis thaliana

2008 ◽  
Vol 21 (8) ◽  
pp. 1067-1075 ◽  
Author(s):  
Song Mi Cho ◽  
Beom Ryong Kang ◽  
Song Hee Han ◽  
Anne J. Anderson ◽  
Ju-Young Park ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Root Colonization ◽  
Stomatal Closure ◽  
Primary Role ◽  
Pseudomonas Chlororaphis ◽  
Biotic And Abiotic Stresses ◽  
Arabidopsis Mutant ◽  
Mutant Lines ◽  
Reduced Water ◽  
Dependent Mechanism

Root colonization of plants with certain rhizobacteria, such as Pseudomonas chlororaphis O6, induces tolerance to biotic and abiotic stresses. Tolerance to drought was correlated with reduced water loss in P. chlororaphis O6-colonized plants and with stomatal closure, indicated by size of stomatal aperture and percentage of closed stomata. Stomatal closure and drought resistance were mediated by production of 2R,3R-butanediol, a volatile metabolite of P. chlororaphis O6. Root colonization with bacteria deficient in 2R,3R-butanediol production showed no induction of drought tolerance. Studies with Arabidopsis mutant lines indicated that induced drought tolerance required the salicylic acid (SA)-, ethylene-, and jasmonic acid-signaling pathways. Both induced drought tolerance and stomatal closure were dependent on Aba-1 and OST-1 kinase. Increases in free SA after drought stress of P. chlororaphis O6-colonized plants and after 2R,3R-butanediol treatment suggested a primary role for SA signaling in induced drought tolerance. We conclude that the bacterial volatile 2R,3R-butanediol was a major determinant in inducing resistance to drought in Arabidopsis through an SA-dependent mechanism.

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