The diversity of drought adaptation in the wide

Monneveux, P.; Belhassen, E.

doi:10.1007/bf00024004

Cited by 66 publications

(25 citation statements)

References 25 publications

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“…obs.). Therefore, reducing leaf area by leaf abscission (drought deciduous response) may be an important mechanism of juvenile and adult drought tolerance/avoidance in S. pimpinellifolium , as in other xerophytes (Monneveux and Belhassen 1996); in the case of the coastal S. pimpinellifolium populations, drought‐induced leaf abscission might be an adaptation to a more episodic rainfall pattern along the coast, where an ability to reduce leaf area to cope with prolonged aridity after a rainfall event would be beneficial. This hypothesis can be directly evaluated in future studies.…”

Section: Resultsmentioning

confidence: 99%

Environmental Factors Predict Adaptive Phenotypic Differentiation Within and Between Two Wild Andean Tomatoes

2008

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Environmental variation is widely viewed as a major force driving morphological change and speciation. Although many environmental attributes are potentially critical for adaptive responses within and between species, the individual and relative importance of these diverse attributes remain poorly understood. Here we combine a geographical information systems (GIS)-based analysis of environmental variation with a multipopulation analysis of phenotypic, physiological, and genetic variation, to generate and test hypotheses of environmental factors likely driving adaptive divergence within and between two wild Andean plant species. First, we document large environmental differences between population locations of the two species, and among regions within species. Second, we show evidence for inter-and intraspecific differences in genetically based phenotypic and physiological variation. Third, combining these data, we report evidence for trait-environment associations both among populations within species, and between species, that are strongly indicative of recent and rapid adaptive responses. Finally, we show that these trait-environment associations cannot be simply explained by genetic relatedness within species, reinforcing our inference that local, regional, and species-wide environmental conditions are responsible for phenotypic and physiological diversification. The strongest trait-environment associations involve temperature and precipitation gradients, suggesting these climatic factors are predominant drivers of adaptive diversification in these species.

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Section: Resultsmentioning

confidence: 99%

Environmental Factors Predict Adaptive Phenotypic Differentiation Within and Between Two Wild Andean Tomatoes

2008

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“…Species trait distribution changed according to a composite, spatially-structured gradient, embracing variations in climate (annual rainfall, and associated vegetation features: epiphytism, summit forest, habitats), inselberg shape (flattened versus dome-shaped, low versus high elevation), composition of the surrounding forest (semi-open versus closed canopy) and human influences. Among traits, suffrutescence, climbers, and autochory are drought-adaptive traits (Monneveux and Belhassen, 1996;Schnitzer, 2005). These traits are better represented at a lower level of annual rainfall on peneplain inselbergs by Ernestia spp.…”

Section: Abiotic Parameters and Response Traits At Coarse And Fine Scalementioning

confidence: 99%

From inselberg to inselberg: Floristic patterns across scales in French Guiana (South America)

Sarthou

Pavoine

Gasc

et al. 2017

Flora

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Granitic outcrop vegetation was compared in 22 inselbergs of French Guiana, South America, using RLQ and fourth-corner analyses to identify the main relationships between environmental gradients and plant traits. At the scale of the whole territory the distribution of species and species traits was mostly driven by a spatially-structured gradient embracing regional climate (annual rainfall), forest matrix (canopy openness), and inselberg features (altitude, shape, habitats, summit forest, degree of epiphytism, fire events). Biogeographic, environmental and past historical factors contribute to explain the variation observed at coarse scale and two groups of inselbergs are identified. A first group occupies the southern peneplain in a semi-open forest matrix and exhibits a higher representation of suffrutescent species and climbers, a lower representation of upright shrubs, a lower degree of Guiana Shield endemism, and a higher incidence of human use and autochory. All these features suggest an adaptation to more disturbed environments linked to past climate changes and savannization and to human influences. A second group, characterized by opposite plant traits, occupies the northern part of French Guiana and the far south within a closed forest matrix. Within archipelagos (inselbergs at less than 7 km distance), C-score and Mantel tests revealed a random co-occurrence of plant species and an increase of floristic dissimilarity with distance without any concomitant change in plant traits, respectively, suggesting that spatially-structured stochastic factors (limitation by dispersal) were the driving force of vegetation change at fine scale.

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“…Plants of arid and semi-arid environments show sunken stomata, often covered by resinous masses and wax layers or confined in deep crypts of the lamina [32,33]. These crypts are often occluded by wax tubules or trichomes which might further reduce transpiration.…”

Section: Stomatal Regulationsmentioning

confidence: 99%

Adaptive Strategies of Desert Plants in Coping with the Harsh Conditions of Desert Environments: A Review

Ekwealor

Echereme

Ofobeze

et al. 2020

IJPSS

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The low and erratic precipitation of desert habitats and the resultant drought have been a huge environmental challenge to the desert flora. Because these organisms must harmonize their structures and functions to thrive in their environments, they have evolved a range of strategies to survive the drought that characterizes the desert ecosystem. Desert plants have adopted some strategies like drought tolerance, drought escape, and succulence as the means to conserve and use water. Also, to minimize the rate of transpiration, they have evolved leaf sclerophylly. All these adaptations and more, play an important role in the organisms’ ability to conquer the harsh conditions of desert environments amidst the prevailing climate changes. It seems that some of these plants could potentially serve as models for understanding drought adaptation mechanisms and their potential uses. It is expected that understanding the response of plants to increasing drought would be important in the light of global and regional climate changes, not only to forecast population dynamics in natural ecosystems but also to adjust management processes in agronomy and vegetation management for improvement.

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The diversity of drought adaptation in the wide

Cited by 66 publications

References 25 publications

Environmental Factors Predict Adaptive Phenotypic Differentiation Within and Between Two Wild Andean Tomatoes

Environmental Factors Predict Adaptive Phenotypic Differentiation Within and Between Two Wild Andean Tomatoes

From inselberg to inselberg: Floristic patterns across scales in French Guiana (South America)

Adaptive Strategies of Desert Plants in Coping with the Harsh Conditions of Desert Environments: A Review

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