biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 44:167-174, 2001 | DOI: 10.1023/A:1010277403705

Development of Autotrophy and Tolerance to Acclimatization of Myrtus Communis Transplants Cultured In Vitro under Different Aeration

M. Lucchesini1, A. Mensuali-Sodi1, R. Massai2, R. Gucci2
1 Scuola Superiore di Studi Universitari e di Perfezionamento "S. Anna", Pisa, Italy
2 Dipartimento di Coltivazione, Difesa delle Specie Legnose, Pisa, Italy

The behaviour of myrtle (Myrtus communis L.) plantlets during the last phase of in vitro culture before transplanting was studied. Myrtle plants were sampled from Mediterranean shrubland vegetation. In vitro growth of myrtle microcuttings was evaluated during the rooting phase using 500 cm3 containers fitted with two different types of closures. The number of gas exchanges and time in which aerated and closed vessels lose half of their gas content were calculated. Both types of vessel closure allowed photosynthetic activity in myrtle cultures even though the higher aeration rate induced higher net photosynthetic rate (PN) during all the culture. In vitro morphogenetic and rooting of myrtle microcuttings were affected by the different environment conditions inside the culture vessels: plantlet growth and root formation of myrtle explants increased in aerated vessels in comparison with closed ones. The well developed root system, the higher PN and dry mass accumulation during the pre-acclimatization phase in aerated vessels induced a better ability to face the transplant stress.

Keywords: CO2; gas exchange; myrtle; micropropagation; net photosynthetic rate
Subjects: auxins; CO2, culture in vitro, autotrophy development; cytokinins; gas exchange, culture in vitro , autotrophy development; in vitro culture, autotrophy development; myrtle; Myrtus communis; photoautotrophy, in vitro culture; photomixotrophy, in vitro culture

Published: June 1, 2001  Show citation

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Lucchesini, M., Mensuali-Sodi, A., Massai, R., & Gucci, R. (2001). Development of Autotrophy and Tolerance to Acclimatization of Myrtus Communis Transplants Cultured In Vitro under Different Aeration. Biologia plantarum, 44(2), 167-174. doi: 10.1023/A:1010277403705
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