Water Stress in Three Species of Eucalyptus
Abstract:The effects of soil water stress on potted seedlings of Eucalyptus rostrata Schl., E. polyanthemos Schau., and E. sideroxylon Cunn. var. rosea Hort. were studied. Transpiration, shoot growth, and leaf growth were reduced most by water stress in E. rostrata and least in E. sideroxylon. Leaf water deficit at stomatal closure was greater and leaf water potential at wilting of sunflower plants was lower in E. rostrata than in E. sideroxylon. Excised twigs of E. rostrata also lost water more rapidly than twigs of the other two species. Rate of root extension did not differ significantly among the three species. It is believed that E. rostrata suffers more injury from soil water stress than the other two species because its stomata close more slowly when leaf water stress develops and it has a higher rate of cuticular transpiration. Forest Sci. 16:74-78.
Document Type: Journal Article
Affiliations: Forest Botanist, Pakistan Forest Institute, Peshawar, West Pakistan
Publication date: March 1, 1970
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