Water relations of selected populus clones
The Populus clones examined, exhibited wide variation in stomatal frequency. length of stomatal complex and leaf surface distribution patterns. Cluster analyses showed that stomatal configurations were moderately linked with parentage. Demonstrated clonal differences in growth rate in greenhouse or growth chamber environments could not be associated with differences in gas exchange arising from stomatal pore occlusion. Clonal differences in water balance were clear, the clones with highest growth potential utilizing various methods of superior water acquisition, better water transport and close stomatal control of water loss under water stress, to maintain crown hydration. The stomatal sensitivity to vapour pressure deficit of two rapidly growing clones of Populus candicans Populus berolinensis was associated with the known drought resistance of Populus berolinensis. Of four clones grown under controlled conditions, the more rapidly growing ones had higher estimated net assimulation rates, more rapid root growth and a higher root weight per unit leaf area than the more slowly growing clones.
- Research Organization:
- Wis.- Madison Univ., Madison, USA
- OSTI ID:
- 6442771
- Journal Information:
- Diss. Abstr. Int. B; (United States), Journal Name: Diss. Abstr. Int. B; (United States) Vol. 40:3; ISSN DABBB
- Country of Publication:
- United States
- Language:
- English
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