Increased Stomatal Resistance in Two Cultivars of Almond Sensitive to Bud Failure1
| Autor: | S. A. Weinbaum, Z. Even-Chen, D. E. Kester |
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| Rok vydání: | 1980 |
| Předmět: | |
| Zdroj: | HortScience. 15:583-585 |
| ISSN: | 2327-9834 0018-5345 |
| Popis: | Leaf resistance (r1) in fully exposed leaves of bud-failure (BF) sensitive subclones of 2 almond (Prunus amygdalus Batsch) cultivars was much greater than in leaves of non-BF-sensitive (normal) subclones of these cultivars. The differences in resistance were evident at ambient temperatures between 26° and 38°C, and temperatures of fully exposed leaves on BF-sensitive plants exceeded ambient temperature and averaged 5° higher than leaf temperature of normal plants. The difference between BF-sensitive and normal subclones was not apparent below 25° or above 39°. Increase in resistance preceded the development of abnormal growth patterns characteristic of the BF syndrome, and these differences may serve to identify BF sensitivity at incipient stages of the syndrome. Stress is accentuated in BF-sensitive clones between 26° and 38° because transpirational cooling is suppressed; however, the physio-chemical basis of BF sensitivity remains obscure. |
| Databáze: | OpenAIRE |
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