Acclimatization of in Vitro Propagated Pineapple (Ananas comosuss (L.), var. Smooth cayenne) Plantlets to ex Vitro Condition in Ethiopia - American Journal of Plant Sciences

AJPS > Vol.4 No.2, February 2013

Acclimatization of in Vitro Propagated Pineapple (Ananas comosuss (L.), var. Smooth cayenne) Plantlets to ex Vitro Condition in Ethiopia ()

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DOI: 10.4236/ajps.2013.42042 6,224 Downloads 10,168 Views Citations

Author(s)

Ayelign Mengesha, Biruk Ayenew, Tewodros Tadesse

Affiliation(s)

Ethiopia Institute of Agricultural Research, Jimma Agricultural Research Center, Plant Biotechnology Research, Jimma, Ethiopia.

ABSTRACT

Pineapple (Ananas comosuss, var. Smooth cayenne), which is a popular tropical fruit, is propagated vegetatively. Conventional propagation alone does not provide clean and adequate planting material demanded in Ethiopia. Recently, in vitro multiplication has become a promising technique for large-scale production. However, the acclimatization to the external environment procedure impedes the efficiency, which needs carefully optimized acclimatization techniques. We report optimized acclimatization procedures following first- and second-stage hardening methods for in vitro pineapple plantlets. Primarily, Jiffy-7 peat pellet allowed growing plants vigorously and provided above 8% survival rate over soil mix. Nevertheless, in Ethiopia, soil mix is cheaper and locally accessible. The primarily acclimatized plantlets are needed to be hardened further for better establishment and survival in the field. Black polybag and polysleeve pots filled with soil mix were evaluated in the greenhouse. A significant difference was obtained between pots for number of roots and substrate weight. Polybags had higher root number than polysleeves and saved about 27% of substrates per plant, which is a reduction of 25% of total transportation cost. Hence, the soil mix and polybags were found to be preferable over substrates and pots, for subsequent in vitro pineapple acclimatization.

KEYWORDS

Acclimatization; Ananas comosuss; ex Vitro; in Vitro; Pots; Substrates

Share and Cite:

A. Mengesha, B. Ayenew and T. Tadesse, "Acclimatization of in Vitro Propagated Pineapple (Ananas comosuss (L.), var. Smooth cayenne) Plantlets to ex Vitro Condition in Ethiopia," American Journal of Plant Sciences, Vol. 4 No. 2, 2013, pp. 317-323. doi: 10.4236/ajps.2013.42042.

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