Responses of tree-type and shrub-type Prosopis (Mimosaceae) taxa to water and nitrogen availabilities

Vilela, Alejandra E.; Rennella, M.J; Ravetta, D.A.

doi:10.1016/s0378-1127(03)00299-8

Cited by 22 publications

(24 citation statements)

References 26 publications

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“…Contrary to what we expected, P. bracteosa seedlings had higher overall average photosynthetic rates than L. ferrea seedlings. This result is in accordance with other studies that demonstrated that stress-tolerant species maintained high CO 2 uptake while grown under non-limiting water availability (DeLucia & Heckathorn 1989;Patterson et al 1997;Vilela et al 2003), ruling out the likelihood that a trade-off between drought tolerance and CO 2 uptake constrains tolerant species from occupying high-resource environments. Studies indicated that the main trait associated with inherently slow-growing species from low-resource environments is low SLA (Lambers & Poorter 1992;Maranon & Grubb 1993;Lambers et al 1998).…”

Section: Discussionsupporting

confidence: 92%

“…According to Chapin III et al (1993), compared with slow-growing species, fast-growing species have a higher dependence on new environmental resources, which make them more vulnerable to fluctuations in resource availability. Other studies have demonstrated that species of high-resource environments take advantage of the water supply increase, while species adapted to stress are less plastic (Vilela et al 2003;Otieno et al 2005;Villagra & Cavagnaro 2006).…”

Section: Discussionmentioning

confidence: 99%

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Effect of water stress on seedling growth in two species with different abundances: the importance of Stress Resistance Syndrome in seasonally dry tropical forest

et al. 2015

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In seasonally dry tropical forests, species carrying attributes of Stress Resistance Syndrome (SRS) may have ecological advantages over species demanding high quantities of resources. In such forests, Poincianella bracteosa is abundant, while Libidibia ferrea has low abundance; therefore, we hypothesized that P. bracteosa has characteristics of low--resource species, while L. ferrea has characteristics of high-resource species. To test this hypothesis, we assessed morphological and physiological traits of seedlings of these species under different water regimes (100%, 70%, 40%, and 10% field capacity) over 85 days. For most of the studied variables we observed significant decreases with increasing water stress, and these reductions were greater in L. ferrea. As expected, L. ferrea maximized their growth with increased water supply, while P. bracteosa maintained slower growth and had minor adjustments in biomass allocation, characteristics representative of low-resource species that are less sensitive to stress. We observed that specific leaf area, biomass allocation to roots, and root/shoot ratio were higher in L. ferrea, while biomass allocation to leaves and photosynthesis were higher in P. bracteosa. Results suggest that the attributes of SRS can facilitate high abundance of P. bracteosa in dry forest.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Effect of water stress on seedling growth in two species with different abundances: the importance of Stress Resistance Syndrome in seasonally dry tropical forest

et al. 2015

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“…The development of plants under high light may increase the storage capacity of carbohydrates and other nutrients in the stem (Johnson et al 2002), as well as decrease stem elongation and increase the thickness of this organ (Petritan et al 2009), consequently favouring its resistance to physical damage (Cleary et al 1978). High irradiance can also increase biomass distribution to root system, which contributes to water and nutrient uptake (Vilela et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

et al. 2015

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The recomposition of deforested environments demands the acclimation of seedlings in nurseries. This process induces changes in physiological, anatomical, and morphological traits of plants, favouring their establishment after transplantation to the field. The present study aimed to verify the influence of full sunlight acclimation on seedling hardiness. For the purpose, leaf gas-exchange, plant anatomical and morphological parameters of three tree species [Ceiba speciosa (A. St.-Hil.) Ravenna (Malvaceae), Croton floribundus Spreng. (Euphorbiaceae), and Cecropia pachystachya Trecul (Urticaceae)], which are used for reforestation in the Brazilian Atlantic Biome, were evaluated. Seedlings were grown under 40% of total PPFD (shaded control) and under full sun (acclimated) for 168 days. The acclimation process induced a higher leaf production rate in C. speciosa and C. floribundus, whereas C. pachystachya seedlings replaced their leaves quickly, irrespective of the light conditions. The newly developed leaves of all three species presented a lower area and thicker palisade parenchyma, resulting in a reduced specific leaf area. The seedlings of C. speciosa and C. pachystachya showed increases in light-saturated net photosynthesis and transpiration rates, whereas water-use efficiency generally remained unchanged in all three species. The full sun acclimated seedlings of C. pachystachya showed a reduced relative growth rate, lower height/stem diameter (H/D) and shoot to root dry mass ratios, characteristics that may result in greater physical resistance and ability for water and nutrient uptake to support the higher transpiratory demand under full sun. The reduction of H/D ratio also occurred in the acclimated seedlings of C. speciosa. The seedlings of C. floribundus showed few changes during acclimation, but they did not seem to be affected by excessive light. In spite of the observed differences among the three species, all of them developed hardiness characteristics, mainly related to leaf anatomy, which should favour their establishment after transplantation to the field.Additional key words: ecological anatomy, environmental restoration, mesophyll, plant ecophysiology.

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“…Briefly, CO 2 uptake was recorded using a portable infrared analyzer open gas exchange system (ADC, Hertfordshire, UK). Measurements were recorded during mid-morning (10-12 am) in the last three fully expanded leaves per plant (3 plants per plot; 3 plots per treatment; Vilela et al, 2003). Each measurement took ca.10 s. Watering was applied, for both treatments, from September to April, when plants are in full-leaf.…”

Section: Plant Materials and Experimental Designmentioning

confidence: 99%

“…Given the potentially large intra-specific variability of Prosopis in size, habit and life history (Burkart, 1976;Vilela et al, 2003;Villagra and Cavagnaro, 2006), we expect watering treatments to provoke differences in relative growth rate and consequently, size disparity between groups (i.e. plants subjected to drought-stress will be smaller than control plants).…”

Section: Introductionmentioning

confidence: 99%

Long-term plasticity in growth, storage and defense allocation produces drought-tolerant juvenile shrubs of Prosopis alpataco R.A. Philippi (Fabaceae)

Vilela¹,

Agüero²,

Ravetta³

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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Responses of tree-type and shrub-type Prosopis (Mimosaceae) taxa to water and nitrogen availabilities

Cited by 22 publications

References 26 publications

Effect of water stress on seedling growth in two species with different abundances: the importance of Stress Resistance Syndrome in seasonally dry tropical forest

Effect of water stress on seedling growth in two species with different abundances: the importance of Stress Resistance Syndrome in seasonally dry tropical forest

Morphoanatomy and ecophysiology of tree seedlings in semideciduous forest during high-light acclimation in nursery

Long-term plasticity in growth, storage and defense allocation produces drought-tolerant juvenile shrubs of Prosopis alpataco R.A. Philippi (Fabaceae)

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