Abstract
This study aimed to evaluate the effect of spectral light quality on different anatomical features of banana tree plantlets grown under coloured shade nets. Banana plants of five genotypes (Maçã, Thap Maeo, Caipira, BRS Platina and Princesa), obtained from micropropagation, were grown under white, blue, red and black nets, with shade of 50%, in a completely randomized design. After 90 days of acclimatization under nets, the leaves were collected and analyzed anatomically following basic protocol of plant microtechnique. Cultivation under white net provided greater thickness of epidermis cells, hypodermis on the adaxial face and palisade parenchyma; and greater stomatal density on the adaxial face; both the red and white nets, however, increased stomatal density on the abaxial face. The use of white net, during the acclimatization phase, is recommended for cultivation of banana plantlets obtained of micropropagation. Key words: Musa sp., acclimatization, spectral quality, anatomical plasticity.
Highlights
The mesophyll is characterized as dorsoventral, showing palisade parenchyma oriented toward the epidermis of the adaxial face just beneath the hypodermis of the adaxial face, and spongy parenchyma is oriented toward hypodermis of abaxial face (Sumardi and Wulandari, 2010)
Plants grown under white net showed greater size of epidermal cells on the adaxial face, except for the Caipira genotype which had greater thickness of epidermal cells when grown under red net (Table 2)
Maeo genotypes exhibited greater thickness under white net, while BRS Platina and Princesa genotypes were more prominent under blue net
Summary
According to FAO (2012), the banana production worldwide was around 101.9 million tons, and Brazil was responsible for 6.8 million tons, being ranked 5th in the world rankings of the major producing countries.Currently, much of the production of banana plantlets is derived from micropropagation which is a method that promotes the formation of large number of plants in a short time and free of pathogens (Pereira et al, 2005).Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0International LicenseAbbreviations: AdE, Epidermis on the adaxial face; AbE, epidermis on the abaxial face; AdH, hypodermis of the adaxial face; AbH, hypodermis of the abaxial face; PP, palisade parenchyma; SP, spongy parenchyma; MR, midrib; AdD, stomatal density of the adaxial face; AbD, stomatal density of the abaxial face; PD/ED Ad, polar diameter/equatorial diameter ratio of stomata on the adaxial; PD/ED Ab, abaxial faces.Afr. J. Biotechnol.
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