دورية أكاديمية
Ecophysiological studies of Sonoran Desert plants : III. The daily course of photosynthesis for Acacia greggii and Cercidium microphyllum.
| العنوان: | Ecophysiological studies of Sonoran Desert plants : III. The daily course of photosynthesis for Acacia greggii and Cercidium microphyllum. |
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| المؤلفون: | Szarek SR; Department of Botany and Microbiology, Arizona State University, 85281, Tempe, AZ, USA., Woodhouse RM; Department of Botany and Microbiology, Arizona State University, 85281, Tempe, AZ, USA. |
| المصدر: | Oecologia [Oecologia] 1978 Jan; Vol. 35 (3), pp. 285-294. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Springer Country of Publication: Germany NLM ID: 0150372 Publication Model: Print Cited Medium: Internet ISSN: 1432-1939 (Electronic) Linking ISSN: 00298549 NLM ISO Abbreviation: Oecologia Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: Berlin ; New York, Springer. |
| مستخلص: | The gas exchange and water relations of two Sonoran Desert plants are compared during contrasting periods of water and heat stress. Photosynthesis of Acacia greggii, a winter deciduous shrub, and Cercidium microphyllum, a chlorophyllous stemmed tree, show a moderate correlation with dawn plant water potential. For both species a relationship between stomatal conductance and dawn plant water potential was not apparent, although A. greggii demonstrated a greater overall stomatal conductance. This affected a greater daytime decrease in plant water potential at all levels of water stress and suggests A. greggii is less sensitive to water stress. Our results suggest the lower limit for gross photosynthesis occurs when dawn plant water potentials are less than -44 and -31 bars for the shrub and tree species, respectively. During periods of extreme water and heat stress the photosynthetic capacity of both species is regulated more by mesophyll than stomatal conductance. However, partial stomatal closure causes plant water potential to increase during the day and exceed dawn values. During periods of minimal water and heat stress the daily course of photosynthesis parallels the change in stomatal conductance and irradiance. Maximum gross photosynthesis rates are nearly three-fold higher than the rates observed during periods of stress, with those of A. greggii generally greater than the rates observed in plants of C. microphyllum. |
| References: | Oecologia. 1976 Sep;26(3):225-234. (PMID: 28309585) Plant Physiol. 1977 May;59(5):863-7. (PMID: 16659957) Oecologia. 1977 Dec;28(4):365-375. (PMID: 28308941) Plant Physiol. 1977 Mar;59(3):348-50. (PMID: 16659848) Plant Physiol. 1977 May;59(5):795-9. (PMID: 16659945) Plant Physiol. 1967 Dec;42(12):1797-9. (PMID: 16656721) |
| تواريخ الأحداث: | Date Created: 20170318 Latest Revision: 20191120 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1007/BF00345137 |
| PMID: | 28310274 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 1432-1939 |
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| DOI: | 10.1007/BF00345137 |