Could the umbel order selection and GA3 treatment improve seed germination in Amazon chicory species?Could the umbel order selection and GA3 treatment improve seed germination in Amazon chicory species?

IF 1.2 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Bragantia Pub Date : 2021-01-01 DOI:10.1590/1678-4499.20200404

Larissa da Fonseca Moraes, Francisco Laurimar do Nascimento Andrade, R. Gomes, L. D. S. Santos

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Abstract

This study aimed to estimate the production of seeds per umbel and to assess both the effect of gibberellic acid (GA3) and umbel order on seed germination in Amazon chicory species. The experiment was conducted in two steps. Firstly, traits related to seed production were evaluated. Afterward, a germination test was carried out, and the following parameters were assessed: germination speed index (GSI), average germination time (AGT), germination percentage (%G), percentage of abnormal seedlings (%AS), and percentage of non-germinated seeds (%NGS). Remarkably, there was strong interaction between the analysed factors. The highest production of seeds per plant was observed in the treatment containing the blend of seeds from different umbels (1.41 g·plant-1), in which the number of umbels by order and the total number of seeds per plant were the major traits related to the improved yield. The application of GA3 at 200 mg·dm-3 increased %G in second-order seeds. Regardless of GA3 application, seeds from secondary umbels showed shorter AGT by up to two days, while no difference in GSI was observed. Collectively, these results offer novel and timely information on the seed germination behavior in Amazon chicory, revealing practical advice of utmost importance for local producers.

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伞形序选择和GA3处理能提高菊苣种子萌发率吗?伞形序选择和GA3处理能提高菊苣种子萌发率吗?

本研究旨在估计亚马逊菊科植物每伞形花序的种子产量，并评估赤霉素酸(GA3)和伞形花序顺序对菊科植物种子萌发的影响。实验分两步进行。首先，对制种相关性状进行了评价。然后进行发芽试验，评估发芽速度指数(GSI)、平均发芽时间(AGT)、发芽率(%G)、异常苗率(%AS)和未发芽种子率(%NGS)。值得注意的是，所分析的因素之间存在很强的相互作用。不同伞形花序种子混合处理单株种子产量最高(1.41 g·株-1)，其中伞形花序序数和单株总种子数是影响产量的主要性状。施用200 mg·dm-3的GA3可提高二级种子的%G。无论施用GA3与否，次生伞形花序种子的AGT都缩短了2天，而GSI没有差异。总的来说，这些结果提供了关于亚马逊菊苣种子萌发行为的新颖和及时的信息，为当地生产者提供了最重要的实用建议。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bragantia AGRICULTURE, MULTIDISCIPLINARY-

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

4 weeks

期刊介绍： Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).