Germinação de sementes e vigor de plântulas de Myrciaria glazioviana submetidas a sombreamentos

Guimarães, Lorena Abdalla de Oliveira Prata; Dariva, Marilene Davel; Oliveira, Sabrina Batista de; Bellon, André Ângelo; Mendonça, Guilherme Carneiro de

doi:10.1590/2175-7860201869448

Cited by 4 publications

(1 citation statement)

References 19 publications

(24 reference statements)

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“…Já é conhecido que a presença de clorofila afeta a germinação e o vigor de sementes de importância agronômica, em que os produtos da oxidação da clorofila possuem efeitos prooxidantes ou fotooxidativos, acarretando em perda de qualidade da semente (JALINK et al, 1998;ZORATO et al, 2007). Guimarães et al (2018), ao desenvolverem trabalho de germinação de cabeludinha (Myrciaria glazioviana) em diferentes sombreamentos, destacaram como um fator adicional ao efeito negativo da luz na germinação a oxidação e alterações de substâncias presentes nas sementes.…”

Section: Resultsunclassified

Cultivo >i<in vitro>/i< de cerejeira-do-Rio-Grande (>i<Eugenia involucrata>/i< DC.) e de cambucizeiro (>i<Campomanesia phaea>/i< (O. Berg) Landrum)

Júnior¹,

de²

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In vitro cultivation of cerejeira-do-Rio-Grande (Eugenia involucrata DC.) and cambucizeiro (Campomanesia phaea (O. Berg) Landrum) Brazilian biodiversity is one of the richest in the world with different biomes that comprise its flora and fruit species with great commercial exploitation value. The Atlantic Forest, the third-largest biome in the country, is considered a global hotspot for conservation and biological diversity, with numerous native fruits, including species of the Myrtaceae family, such as the cerejeira-do-Rio-Grande (Eugenia involucrata DC.) and the cambucizeiro (Campomanesia phaea (O. Berg) Landrum). These species have great potential for commercial use, in addition to being extremely important for reforestation and urban afforestation. The cerejeira-do-Rio-Grande and cambucizeiro fruits have high nutritional value, being commercialized fresh or processed, contributing to the diversification of production of Brazilian fruit growers. The commercial multiplication of these fruit trees is carried out through the seminal route and is hampered due to the low storage potential of the seeds. Conventional methods of asexual multiplication in both fruit trees are inefficient, and scientific studies willing to optimize them are scarce. Micropropagation, multiplication of plants through in vitro culture techniques, is an alternative method for large-scale production of commercial seedlings of these fruit trees. Therefore, this work aimed to establish protocols of germination and in vitro multiplication of cerejeira-do-Rio-Grande using nodal explants from seedlings germinated in aseptic conditions and to evaluate the different processes and culture medium components for the establishment and multiplication of nodal and leaf explants of cerejeira-do-Rio-Grande and cambucizeiro, originated from plants grown in the greenhouse. The best conditions for seed germination and seedling development of cerejeira-do-Rio-Grande are when they are cultivated in an MS medium supplemented with 15 g L -1 of sucrose, removing the tegument and cultivating in the dark; for in shoot induction and development, the use of 2.5 mg L -1 of 6benzylaminopurine (BAP) and JADS culture medium is recommended; in the subculture, the best results were obtained when adding 1.0 to 2.5 mg L -1 of BAP; finally, it is possible to obtain high rates of rooting of shoots when using WPM, ½ WPM, ¼ WPM, and JADS culture media without any growth regulators. The seedling acclimatization is achieved by using a commercial potting mix (based on pine bark, peat, and vermiculite) mixed with vermiculite in a 1:1 ratio. For the in vitro culture of cerejeira-do-Rio-Grande, explants from plants kept in the greenhouse, the lowest contamination rate, oxidation, and greater survival rate of nodal explants, the collection must be carried out in the autumn, performing the asepsis with sodium hypochlorite (NaClO) containing 1.25% of active chloride. The addition of 1.0 mg L -1 of BAP in the presence of 0.1 mg L -1 of ANA (naphthalene acetic acid) and 2.5 mg L -1 of BAP e...

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Section: Resultsunclassified

Cultivo >i<in vitro>/i< de cerejeira-do-Rio-Grande (>i<Eugenia involucrata>/i< DC.) e de cambucizeiro (>i<Campomanesia phaea>/i< (O. Berg) Landrum)

Júnior¹,

de²

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Emergence and development of weeds according to the sowing depth and light intensity

Marques,

Souza,

Martins

et al. 2023

Rev. Caatinga

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Understanding weed emergence and development aspects is essential in decision-making for management strategies. The study evaluated the effects of different sowing depths and light intensities on the emergence and development of the weeds Sida rhombifolia and Senna obtusifolia under field conditions. Each species constituted an experiment, and the experimental design used was completely randomized, with four replications. The treatments were arranged in a 6 x 4 factorial scheme, with the first factor corresponding to the six sowing depths (0.5; 1.0; 2.0; 4.0; 8.0, and 12.0 cm) and the second at four light intensities (100%, 70%, 50%, and 30% of sunlight). The seedling emergence was evaluated daily to obtain the emergence and emergence speed index. The height, time to floral induction, and dry matter of plants at flowering were also evaluated. When submitted to different levels of shading, S. rhombifolia seedlings emerge up to 12.0 cm deep. S. obtusifolia seedlings emerge at all sowing depths, even when subjected to different solar radiation intensities. Seedlings of S. rhombifolia and S. obtusifolia emerge less and slower in sowings between 8.0 and 12.0 cm depth and develop better under full sunlight in sowings between 1.0 and 4.0 cm depth. Therefore, greater depths delay the development of both species, which is important information for managing these weeds.

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Myrciaria glazioviana, Myrciaria strigipes e Myrciaria trunciflora: análise sistemática, reprodução, fitoquímica e farmacologia

Filho

2021

Sci. Elec. Arch.

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O estudo teve por objetivo, realizar uma revisão sistemática para as três espécies de Myrciaria, M. glazioviana, M. strigipes e M. trunciflora, quanto a sistemática, reprodução, fitoquímica e farmacologia. A metodología consistiu em uma pesquisa bibliográfico de âmbito qualitativo descritivo em várias bases de dados, utilizando descritores em Português, Inglês e Espanhol sobre a sistemática vegetal, reprodução, fitoquímica e farmacologia. Foram observados um número superior de estudos para à espécie Myrciaria glazioviana, seguida de Myrciaria trunciflora e em menor quantitativo para Myrciaria strigipes que carece de dados tanto sobre a reprodução da espécie, quanto das inúmeras atividades biológicas conhecidas. Quanto a reprodução, fitoquímica e possíveis atividades biológicas, essas três espécies ainda são pouco estudadas. Com esse estudo de revisão sistemático, trará aos pesquisadores embasamento teórico revisível, para nortear visando um número maior de pesquisas voltadas para o desenvolvimento farmacológico, agrícola, alimentício e de biotecnologia, visto que, as espécies em estudo, apresentam alto potencial científicos.

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Germinação de sementes e vigor de plântulas de Myrciaria glazioviana submetidas a sombreamentos

Cited by 4 publications

References 19 publications

Cultivo >i<in vitro>/i< de cerejeira-do-Rio-Grande (>i<Eugenia involucrata>/i< DC.) e de cambucizeiro (>i<Campomanesia phaea>/i< (O. Berg) Landrum)

Cultivo >i<in vitro>/i< de cerejeira-do-Rio-Grande (>i<Eugenia involucrata>/i< DC.) e de cambucizeiro (>i<Campomanesia phaea>/i< (O. Berg) Landrum)

Emergence and development of weeds according to the sowing depth and light intensity

Myrciaria glazioviana, Myrciaria strigipes e Myrciaria trunciflora: análise sistemática, reprodução, fitoquímica e farmacologia

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