Controlling plant growth via the gibberellin biosynthesis system – II. Biochemical and physiological alterations in apple seedlings |
| |
| Authors: | S. Y. Wang J. K. Byun G. L. Steffens |
| |
| Affiliation: | Fruit Lab., Beltsville Agricultural Research Center, U. S. Dept of Agriculture, Beltsville, MD 20705, USA.;Dept of Horticulture, College of Agriculture and Animal Science, Yeungnam Univ. Gyeongsan, Korea. |
| |
| Abstract: | Some physiological and biochemical changes in apple seedlings ( Malus domestica Borkh cv. 'York Imperial') caused by an inhibitor of gibberellin biosynthesis, paclobutrazol [(2RS, 3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl) pentan-3-ol], were determined. Paclobutrazol shifted assimilate partitioning from leaves to roots, increased carbohydrates in all parts of apple seedlings, increased chlorophyll content on a leaf area basis, increased soluble protein in leaves, increased mineral element concentration in leaf tissue and increased root respiration. Foliar application of gibberellic acid (GA3) counteracted the effects induced by paclobutrazol. |
| |
| Keywords: | Carbohydrates chlorophyll Malus domestica Borkh mineral composition protein root respiration |
|
|
