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- Title
RELATIONSHIP OF CHANGES IN THE STEM AND LEAF MORPHOLOGY, NUTRIENT AND ENDOGENOUS HORMONE CONTENTS AND FLOWER BUD NUMBER OF POPULUS EUPHRATICA OLIV.
- Authors
GUO, X. F.; ZHAI, J. T.; ZHANG, S. H.; LI, Z.
- Abstract
During Populus euphratica ontogeny, the morphological changes of stems and leaves, nutrient and endogenous hormone contents were significantly different, but the relationship between these changes and the number of flower buds was not clear. We counted the number of P. euphratica flower buds, and measured the morphological of the stems and leaves nutrient and endogenous hormone contents at different ontogeny to clarify the change trends in the morphology and nutrient and endogenous hormone contents of stems and leaves and mutual relationships in the flower bud number throughout the ontogeny. The results showed that in diameter 4, flower buds and broad-ovate leaves appeared meanwhile, indicating that P. euphratica had entered the reproductive growth stage. Between diameter 4 to 12, stem length, leaf number and leaf C/N gradually decreased, and leaf area, leaf nitrogen, organic carbon, and ZR contents gradually increased, indicating diameters 4-12 represent the stage during which vegetative growth and reproductive growth cooccur in P. euphratica. In diameter 14, flower bud number increased significantly, while leaf shape index and stem diameter decreased. P. euphratica began to enter the vigorous reproductive growth stage. In addition, correlations were found between leaf and stem nitrogen, phosphorus, organic carbon, GA3, ABA, IAA contents, leaf C/N and leave and stem morphology was closely related to the ontogeny; the change in coordination significantly affected the flower bud number. The synergistic changes in the nutrient and endogenous hormone contents in P. euphratica stems and leaves regulate the morphology of stems and leaves and flower bud number and directly or indirectly affect the transition from vegetative growth to reproductive growth.
- Subjects
ABSCISIC acid; LEAF morphology; BUDS; FLOWERS; LEAF area; LEAF growth; HORMONES; ONTOGENY; POPLARS
- Publication
Applied Ecology & Environmental Research, 2022, Vol 20, Issue 5, p3873
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/2005_38733891