Abstract
ABSTRACT The aim of this study is to compare physiological development of Heliconia bihai cv. Lobster Claw Two plants derived from in vitro culture of zygotic embryos and conventional propagation. Heliconias obtained from rhizomes and from in vitro multiplication were evaluated every 30 days during ten months under greenhouse conditions. The experimental design was completely randomized, with ten repetitions, and the 2x10 factorial arrangement consisted of two plant multiplication methods and ten evaluations performed at different times. The analyzed biometric parameters were plant height, number of leaves, number of tillers, leaf area, and color intensity in the bracts. Plants derived from in vitro culture showed significant differences in the development of the evaluated physiological parameters in comparison to plants derived from rhizomes, and they also showed early flowering. Although the in vitro cultured plants were derived from zygotic embryos, no morphological changes were found in the vegetative and reproductive parts (inflorescence) of the plants or in the colorimetry. It shows that the in vitro cultures of zygotic embryos may be used as a technique to produce seedlings on a large-scale, thus allowing the floriculture sector to grow in the region and all over the country.
Highlights
O objetivo deste trabalho foi comparar o desenvolvimento fisiológico em casa de vegetação de plantas de Heliconia bihai cv
In order to reduce the negative impacts of the economic crisis on the international markets since 2008, the Brazilian floriculture sector is mainly focused on the domestic consumption to which it directs 96.5% of its production
Treatments were distributed in a 2x10 factorial arrangement consisting of two plant multiplication methods, characterized by plants derived from in vitro culture of zygotic embryos and from conventional vegetative cultivation (VC) and ten evaluations performed at different times (30, 60, 90, 120, 150, 180, 210, 240, 270 and 300 days)
Summary
O objetivo deste trabalho foi comparar o desenvolvimento fisiológico em casa de vegetação de plantas de Heliconia bihai cv. As plantas obtidas do cultivo in vitro apresentaram diferença significativa no desenvolvimento dos parâmetros fisiológicos avaliados em comparação com as plantas provenientes de rizoma, como também, apresentaram precocidade na floração. The flower production chain moved R$ 5.22 billion in 2013, and it grew over 38% in comparison to 2012. This result is considered to be positive against the economic growth prone to stagnation (Junqueira & Peetz, 2014). The country has many native or introduced species that fit the benchmarks and, in this scenario, heliconias stand out mainly for their beauty and rusticity (Albuquerque et al, 2014).
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