Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here


No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Israel Journal of Plant Sciences

Rooted leaf cuttings of Citrus macrophylla Wester were grown in a nutrient solution culture to which growth regulators were added as follows: (a) none (control); (b) paclobutrazol2 at 2 ppm (paclo-2); (c) paclobutrazol at 10 ppm (paclo-10); (d) GA3 at 10 ppm (GA-10); and (e) paclobutrazol and GA3 at 10 ppm each (paclo-10 + GA-10). After 76 days of continuous treatment, no significant changes in leaf area or weight were found in any of the plants. The major effects of paclobutrazol and GA3 were exerted on root morphology and on the partitioning of biomass among the root parts. Paclobutrazol decreased the length of the taproot and of the lateral roots and increased the thickness of lateral roots. When administered alone, GA3 increased the length of the taproot and the thickness of the taproot base. Addition of GA-10 to paclo-10 reversed some of the effects caused by the latter chemical. In all the treatment combinations, the number of lateral roots was smaller than in control plants. During the 76 days of treatment, the total plant dry weight increased more than twofold, solely due to the gain in root mass. The root weight per plant was slightly increased by GA-10 alone and it decreased in the presence of paclo-10, but the values were not significantly different from those in the control. The proportion of root biomass allocated to the taproot was remarkably increased by the GA-10 and paclo-10 + GA- 10 treatments and slightly decreased by paclobutrazol as compared with the control.

Affiliations: 1: Institute of Horticulture, Agricultural Research Organization, The Volcani Center


Full text loading...


Data & Media loading...

1. Aron Y., Monselise S.P., Goren R., Costo J."Chemical control of vegetative growh in citrus trees by paclobutrazol."HortScience1985Vol 209698
2. Bausher M.G., Yelenosky G."Sensitivity of potted citrus plants to top sprays and soil applications of paclobutrazol."HortScience1986Vol 21141143
3. Daziel J., Lawrence D.K."Biochemical and biological effects of Kaurene oxidase inhibitors such as paclobutrazol."Br. Plant Growth Regul. Group1984Vol 114357
4. De Jong T.M., Doyle J.F."Leaf gas exchange and growth reponses of mature Fantasia nectarine trees to paclobutrazol."J. Am. Soc. Hortic. Sei.1984Vol 109878882
5. Hewitt E.J."Sand and water culture methods used in the study of plant nutrition. Techn. Commun. Commonw. Bur. Hortic., East Mailing No. 22."1952
6. Humphries E.C."Dependence of net assimilation rate on root growth of isolated leaves."Ann. Bot. N.S.1963Vol 27175183
7. Mauk C.S., Bausher M.G., Yelenosky G."Influence of growth regulator treatments on dry matter production, fruit abscission, and 14C-assimilate partitioning in citrus."J. Plant Growth Regul.1986Vol 5111120
8. Quinlan J.D., Richardson P.J."Effect of paclobutrazol (PP333) on apple shoot growth."Acta Hortic.1983Vol 14696102
9. Salomon E., Mendel K."Rooting of citrus leaf cuttings."Proc. Am. Soc. Hortic. Sei.1965Vol 86213219
10. Steffens G.L., Byun J.K., Wang S.Y."Controlling plant growth via gibberellin biosynthesis system."I. Growth parameter alterations in apple seedlings. Physiol. Plant.1985Vol 63163168
11. Steffens G.L., Wang S.Y."Physiological changes induced by paclobutrazol (PP333) in apple."Acta Hortic.1984Vol 146135142
12. Wample R.L., Culver E.B."The influence of paclobutrazol, a new growth regulator, on sunflower."J. Am. Soc. Hortic. Sei.1983Vol 108122125
13. Wang S.Y., Byun J.K., Steffens G.L."Controlling plant growth via gibberellin biosynthesis system."II. Biochemical and physiological alterations in apple seedlings. Physiol. Plant1985Vol 63169175
14. Whaley W.G., Kephart J."Effect of gibberellic acid on growth of maize roots."Science1957Vol 125234
15. Williamson J.G., Coston D.C., Grimes L.W."Growth responses of peach roots and shoots to soil and foliar-applied paclobutrazol."HortScience1986Vol 2110011003
16. Wood B.W."Influence of paclobutrazol on selected growth and chemical characteristics of young pecan seedlings."HortScience1984Vol 19837839

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Israel Journal of Plant Sciences — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation