Drought Responses among Seven Southwestern Landscape Tree Taxa

Balok, Coye A.; Hilaire, Rolston St.

doi:10.21273/jashs.127.2.211

Cited by 29 publications

(23 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results from this study correspond to other field-based studies of plant water potential in the southwestern United States (i.e., Lajtha and Barnes, 1991;Lajtha and Getz, 1993;Linton et al, 1998), suggesting that our experiment approximated field soil moisture conditions. Seedling survival over the course of the acute drought was similar to other acute drought studies (Neilson and Wullstein, 1987;Lajtha and Barnes, 1991;Barton and Teeri, 1993;Lajtha and Getz, 1993;Linton et al, 1998;Balok and St. Hilaire, 2002). Although pots are known to constrain root elongation and subsequent water uptake, roots of the seedlings in this study failed to reach the bottom of their pots during the experiment.…”

Section: Discussionsupporting

confidence: 83%

“…Control and drought treatments differed significantly according to Tukey's comparisons (P , 0.01). and Abrams, 1992;Cavendar-Bares, 2000), and several other oak species of the southwestern United States (Q. buckleyi, Q. lobata, Q. macrocarpa, Q. muehlenbergii, and Q. shumardii) (Balok and St. Hilaire, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Understanding the relationship between oak physiology and moisture regimes is especially important in arid regions of North America, where precipitation is already greatly exceeded by evaporative demand and where the water deficit might be increased as a result of global warming (Houghton et al, 2001;Loik et al, 2004). Some reports describe the response of several oak species in the Rocky Mountains (Neilson and Wullstein, 1987;Dickson and Tomlinson, 1996;Ehleringer and Phillips, 1996;Balok and St. Hilaire, 2002), yet to our knowledge, no prior research explains the effects of moisture regime variability across mountain ranges on oak ecophysiology and adaptations to water stress in the oak species complexes in Mexico.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Drought response of two Mexican oak species, Quercus laceyi and Q. sideroxyla (Fagaceae), in relation to elevational position

Poulos

Goodale

Berlyn

2007

American J of Botany

View full text Add to dashboard Cite

To investigate the relationship between the altitudinal distribution of Quercus laceyi and Q. sideroxyla and their physiological responses to drought, we measured relative water content (RWC), water potentials (Ψ(predawn) and Ψ(midday)), photosynthesis (A(max)), stomatal conductance (g), chlorophyll fluorescence (F(v)/F(m)), and spectral reflectance (400-1100 nm) five times during a 7 wk acute drought. Quercus laceyi was drought tolerant, while Q. sideroxyla was a drought avoider; Q. laceyi tolerated lower RWC (Q. sideroxyla = 54%, Q. laceyi = 44%), Ψ(pd) (Q. sideroxyla = -2.6 MPa, Q. laceyi = -3.3 MPa), and Ψ(md) (Q. sideroxyla = -4.5 MPa, Q. laceyi = -6.6 MPa). The F(v)/F(m) also declined first in Q. sideroxyla in wk 6, whereas F(v)/F(m) did not decline in Q. laceyi until wk 7. A(max) and g fell in wk 4, 6, and 7 in drought seedlings of both species, suggesting a decline in CO(2) assimilation during the drought. Leaf spectral reflectance increased with time in response to decreases in leaf photosynthetic pigment concentrations in latter weeks of the drought. The results suggest a close association between the altitudinal distributions of these species and their adaptation to water stress.

show abstract

Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Drought response of two Mexican oak species, Quercus laceyi and Q. sideroxyla (Fagaceae), in relation to elevational position

Poulos

Goodale

Berlyn

2007

American J of Botany

View full text Add to dashboard Cite

show abstract

“…As one of the most important tree sources with excellent resistance to salt, drought, and insect stresses, Fraxinus velutina is widely planted in the world, especially in the saline-alkali lands (Balok and Hilaire 2002). In the present study, a new salt stress-responsive transcription factor gene FvMYB1 from F. velutina was cloned, and then FvMYB1 was introduced into tobacco through Agrobacterium-mediated transformation to verify the potential salt stress tolerance in plants.…”

Section: Introductionmentioning

confidence: 93%

Overexpression of an MYB-Related Gene FvMYB1 from Fraxinus velutina Increases Tolerance to Salt Stress in Transgenic Tobacco

Tian

Sun

et al. 2016

J Plant Growth Regul

View full text Add to dashboard Cite

MYB transcription factors (TFs) in plants play important roles in abiotic stress tolerance. Here, we report that an MYB-related TF gene, named FvMYB1, was isolated from the salt-tolerant tree species Fraxinus velutina Torr. The real-time PCR analysis showed that the FvMYB1 transcript increased remarkably in response to salt treatment. Subsequently, the FvMYB1 gene was transferred into the tobacco genome via the Agrobacterium-mediated approach. PCR and Southern blot verified that the FvMYB1 gene had been expressed in transgenic tobacco. The overexpressing transgenic seedlings displayed better salt tolerance in root length, shoot fresh weight, and shoot/root ratio compared to the wild type. Moreover, along with the superoxide dismutase and peroxidase activities and proline content that were significantly increased in the transgenic plants, the transcriptions of a series of stress-responsive genes were up-regulated under salt treatment. Further, an analysis of the upstream sequence of the FvMYB1 gene revealed that the promoter could enhance GUS gene expression in transgenic tobacco with NaCl treatment. These results indicate that FvMYB1 functions as a transcriptional activator that plays a regulatory role in salt stress tolerance of F. velutina.

show abstract

“…The distribution of other woody plant species in CHIR was also probably related to individual species' adaptations to water availability. Manzanita (i.e., Davis and Mooney 1986), scrub oaks (i.e., Hamerlynck and Knapp 1994;Keeley 1998), and other chaparral species (i.e., Davis et al 1999;Balok and St. Hilaire 2002) are generally found on harsh sites (i.e., low soil moisture, poor soils, etc. ), and are known to be extremely tolerant of drought by maintaining extremely negative water potentials under dry conditions.…”

Section: Basal Areamentioning

confidence: 99%

Environmental controls on dominance and diversity of woody plant species in a Madrean, Sky Island ecosystem, Arizona, USA

2007

View full text Add to dashboard Cite

The Sky Island archipelagos of the Sierra Madre Occidental contain diverse, highly endemic, and topographically complex ecosystems, yet the local and landscape-scale controls on woody plant dominance and diversity patterns are poorly understood. This study examines variation in woody plant species composition in relation to a suite of environmental variables (i.e., elevation, potential soil moisture, soil type, geologic substrate, and heat load) in the Chiricahua National Monument, Arizona (CHIR). Nine vegetation types were identified using cluster analysis that varied by species composition and plant life form. Non-metric multidimensional scaling and correlation analyses identified significant relationships between vegetation composition and elevation, potential soil moisture, and heat load. Rarefied species richness varied among vegetation types, and in relation to topography, with higher species richness occurring on more topographically complex sites. b (species turnover) and c (landscape) diversity were also high in CHIR compared to other temperate forests. This study highlights the importance of local-and landscape-scale environmental controls on species diversity and vegetation patterns in Madrean evergreen woodlands.

show abstract

Drought Responses among Seven Southwestern Landscape Tree Taxa

Cited by 29 publications

References 34 publications

Drought response of two Mexican oak species, Quercus laceyi and Q. sideroxyla (Fagaceae), in relation to elevational position

Drought response of two Mexican oak species, Quercus laceyi and Q. sideroxyla (Fagaceae), in relation to elevational position

Overexpression of an MYB-Related Gene FvMYB1 from Fraxinus velutina Increases Tolerance to Salt Stress in Transgenic Tobacco

Environmental controls on dominance and diversity of woody plant species in a Madrean, Sky Island ecosystem, Arizona, USA

Contact Info

Product

Resources

About