Yousr Et Al


Yousr et al

Greener Journal of  Agricultural Sciences Vol. 4 (5), pp. 178-186, June 2014.

 ISSN: 2276-7770 

Research Paper

Manuscript Number: 021014100


Effects of Controlled Mycorrhization on Production of Jacaranda


Zaouchi Yousr*, Ben
Bahri Nada, Ben Jeddi Faysal, Rezgui Salah, Bettaieb Taoufik


Institut National
Agronomique de Tunisie (INAT), 1082 Tunis – Mahrajène, Tunisie.


*Corresponding Author’s Email: yosr_zaouchi_koubaji@ live. fr, Tel: (+216) 71 28 71 10,

Fax: (+216) 71 79 93 91


and mineral absorption of ornamental woody plant such as Jacaranda mimosifolia
D. Don., in gnotoxenic conditions out of a mycorrhization by a commercial inoculum
containing Glomus irregulare were studied.

plants are one- year old, they were first grown, in 10/12cm caliber pots then in 16/18cm caliber pots for 6 months
in a sterile substrate consisting of 2/3 commercial peat and 1/3 sand. Four
treatments, achieved three times, were processed. Apart from the control, two
other treatments consisted of the addition of commercial inoculum
containing Glomus irregulare to the culture substrate, at a rate of 62.5
mg / plant for the first and 100 mg / plant for the second. These quantities
respectively correspond to 100 propagules / plant and 160 propagules / plant.
The fourth treatment is illustrated by the incorporation of 4g/plant of OSMOCOT
EXACT standard-Scotts fertilizer; 15 + 9 + 12 (+2.5), into the substrate.

rate of inoculated plants by 100mg/plant dose reached 43.21% while it only
reached 21.48% for those that received 62.5mg/plant. Colonization remains at
the beginning of installation presenting essentially mycorrhizal hyphae
structures.  Mycorrhization significantly
improves nitrogen, phosphorus and potassium nutrition of Jacaranda. This
results in a stimulation of plant growth Level of mycorrhization by 21.48% and achieve
gains of aerial dry biomass of about 45.5% and root volume of about 46.29%.
When the level of mycorrhization is equal to 43.21%, these
gains correspond to, respectively, 59.1% and 67.28%. Fertilization provides for
gains of 29.58% in aerial dry biomass and 9.69% in plants height. It has no
effect on roots volume.

Keywords: Jacaranda mimosifolia D. Don- controlled
mycorrhization- commercial inoculums- growth-nutrition.


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