fruit morfometry and germination of campomanesia xanthocarpa o. berg seeds
morfometria dos frutos e germinação de sementes de campomanesia xanthocarpa o. berg

Clicks: 102
ID: 248982
2012
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Abstract
This study aimed to quantify the morphometric variables of fruits and seeds as well as the effects of substrate and photoperiod on the germination of Campomanesia xanthocarpa O. BERG, collected from eight mature trees located on the western Parana state region in September of 2005 and 2006. Seeds extracted with the aid of running water and dried under shade. The fruits were separated into three stages of ripening. The color of the fruit was compared epicarp by Munsell Color Chart For Plant Tissues described as dark green, yellow-orange and orange intense. We evaluated seed morphometry as well as mass and water content of fruits and seeds. Furthermore, we germinated seeds from the three maturation stages in sand and on paper substrates with and without photoperiod. Germination was considered from radicle protusion radicle until emission of the protophylls, while the plantlet was considered established when the protophylls were fully expanded. Based on the results, we concluded that there was no significant difference in the mass of the whole fruit, the diameter and the length of the fruit. The fruits of C.xanthocarpa showed variations in moisture content decreased the weight from the first stage of ripening. It was found that the seeding on paper at 25 ° C was indifferent to the presence of photoperiod and promoted greater and more rapid germination. The greatest physiological potential was achieved in seeds extracted from fruit with yellow-orange pericarp.

O ensaio objetivou quantificar a morfometria de frutos e sementes e comparar os efeitos do substrato e do fotoperiodo na germinação de Campomanesia xanthocarpa O. BERG em função do estádio de maturação do fruto com estruturas reprodutivas coletadas de oito matrizes adultas no oeste do Paraná em setembro de 2005 e de 2006. Os frutos foram separados em três estádios de amadurecimento de acordo com a coloração do epicarpo com auxílio da carta de cores de MUNSELL recebendo a denominação de verde-escuro, amarelo-laranja e laranja intenso. As sementes foram extraídas dos frutos com água corrente e secas à sombra. As quantificações incluíram as dimensões morfométricas, assim como a massa e o teor de água de frutos e sementes. Além disto, verificou-se a germinação das sementes em substratos de areia e papel e o efeito da presença ou ausência de fotoperíodo nos três estádios de maturação. A germinação da semente foi considerada desde a emissão da radícula até a emissão dos protófilos, sendo a plântula considerada estabelecida quando os protófilos estavam totalmente expandidos. Não houve diferença significativa na massa do fruto inteiro, assim como no diâmetro e no comprimento dos frutos dos diferentes estádios. Os frutos de C. xanthocarpa apresentaram variações decrescentes no teor de umidade da massa fresca, a partir do estádio verde-escuro. A semeadura sobre papel a 25ºC foi indiferente à presença de fotoperíodo e resultou na maior e mais rápida germinação. O maior potencial fisiológico foi alcançado com sementes extraídas de frutos com pericarpo de cor amarelo-laranja.

Reference Key
malavasi2012semina:fruit Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ubirajara Contro Malavasi;Marlene de Matos Malavasi;Neusa Francisca Michelon Herzog
Journal frontiers in neuroendocrinology
Year 2012
DOI
10.5433/1679-0359.2012v33n4p1359
URL
http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/7429
Keywords
Agriculture (General)

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