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Showing results for barbara predawn
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Seasonal changes in physiological performance in wild Clarkia xantiana populations: Implications for the evolution of a compressed life cycle and self-fertilization.
Dudley LS, Hove AA, Emms SK, Verhoeven AS, Mazer SJ. Dudley LS, et al. Am J Bot. 2015 Jun;102(6):962-72. doi: 10.3732/ajb.1400557. Epub 2015 Jun 9. Am J Bot. 2015. PMID: 26101420 Free article.
METHODS: We examined seasonal and interannual variation in abiotic environmental conditions (estimated by ambient temperature, relative humidity, predawn leaf water potentials, and carbon isotope ratios) and physiological traits (photosynthesis, conductance, transpiration, …
METHODS: We examined seasonal and interannual variation in abiotic environmental conditions (estimated by ambient temperature, relative humi …
A comparative study of oak (Quercus, Fagaceae) seedling physiology during summer drought in southern California.
Mahall BE, Tyler CM, Cole ES, Mata C. Mahall BE, et al. Am J Bot. 2009 Apr;96(4):751-61. doi: 10.3732/ajb.0800247. Epub 2009 Mar 20. Am J Bot. 2009. PMID: 21628230 Free article.
We measured water relations, chlorophyll fluorescence, and gas exchange during these seedlings' fourth and fifth summers and compared them to neighboring adults. Most seedlings had substantially lower values for predawn xylem pressure potential (psi(pd)), minimum photosyst …
We measured water relations, chlorophyll fluorescence, and gas exchange during these seedlings' fourth and fifth summers and compared them t …
Positive and negative plant interactions contribute to a north-south-patterned association between two desert shrub species.
Schenk JH, Mahall BE. Schenk JH, et al. Oecologia. 2002 Aug;132(3):402-410. doi: 10.1007/s00442-002-0990-9. Epub 2002 Aug 1. Oecologia. 2002. PMID: 28547418
These positive effects were likely at least partly due to shading. Removal of Ambrosia neighbors negatively affected predawn xylem pressure potentials of Acamptopappus, but this effect was only found during one growing season and was briefly reversed during the next. ...
These positive effects were likely at least partly due to shading. Removal of Ambrosia neighbors negatively affected predawn xylem pr …
Drought and changes in leaf orientation for two California chaparral shrubs: Ceanothus megacarpus and Ceanothus crassifolius.
Comstock JP, Mahall BE. Comstock JP, et al. Oecologia. 1985 Mar;65(4):531-535. doi: 10.1007/BF00379668. Oecologia. 1985. PMID: 28311861
Predawn xylem pressure potentials were measured on two California chaparral shrubs, Ceanothus megacarpus and Ceanothus crassifolius, throughout the winter and spring growing season and into the summer drought. On the days xylem pressure potentials were measured, leaf orien …
Predawn xylem pressure potentials were measured on two California chaparral shrubs, Ceanothus megacarpus and Ceanothus crassifolius, …