The hydrolysis dynamic of storage reserves in maize seed germination helps to explain differences in inbred lines and hybrid seed vigor

IF 1.1 4区 农林科学 Q3 AGRONOMY Journal of Seed Science Pub Date : 2022-01-01 DOI:10.1590/2317-1545v44258701
Daniele Nerling, C. Coelho, Adriele Brümmer
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引用次数: 2

Abstract

Abstract: Storage reserves composition is directly related to the manifestation of seed vigor. However, the physiological potential expression in inbred lines, as well as hybrids from the storage reserves hydrolysis, is not clear. Thus, the aim of this study was focused on verifying if there are differences in the hydrolysis of seed storage reserve of maize inbred lines or hybrids during germination, and also checking if the changes in hydrolysis are associated with seed vigor. The seeds of inbred lines and hybrids were submitted to germination test, vigor by accelerated aging and cold tolerance. Biochemical profiling (total protein content, soluble proteins, phytate, inorganic phosphorus, starch, and soluble sugars), was temporally determined at 0 h (quiescent seeds), 12 h, 24 h, 30 h, and 48 h after imbibition. The seeds of inbred lines showed a longer time for root protrusion and less vigor when compared to hybrids. The highest hydrolysis rates in inbred lines were observed in phase I and at the end of phase II of germination. In hybrids, the rates remained, on average, constant throughout germination. The greatest differences in the hydrolysis of reserve compounds occur in phase II of germination and differentiate the germination metabolism of hybrids and inbred lines.
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玉米种子萌发过程中贮藏储量的水解动态有助于解释自交系和杂交种种子活力的差异
摘要:贮藏储量组成直接关系到种子活力的表现。然而,在自交系和杂交种中,储存储备水解的生理电位表达尚不清楚。因此,本研究的目的是验证玉米自交系或杂交种在萌发过程中种子储存储备的水解是否存在差异,以及水解的变化是否与种子活力有关。对自交系和杂交种进行了萌发试验、加速老化活力试验和耐寒性试验。生物化学分析(总蛋白含量、可溶性蛋白、植酸盐、无机磷、淀粉和可溶性糖)在渗吸后0 h(静止种子)、12 h、24 h、30 h和48 h临时测定。与杂交种相比,自交系种子的根系突出时间较长,活力较弱。在自交系中,水解率最高的是在萌发期1和萌发期2末。在杂交种中,平均而言,在萌发过程中,这个比率保持不变。储备化合物水解的最大差异发生在萌发的第二阶段,并区分杂种和自交系的萌发代谢。
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来源期刊
Journal of Seed Science
Journal of Seed Science Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
2.00
自引率
30.00%
发文量
28
审稿时长
12 weeks
期刊介绍: From 2017 the Journal of Seed Science (JSS) will circulate online version only. Original scientific studies and communications, not yet published or submitted to another journal for publication and written in Portuguese or English, will be accepted for publication. For manuscripts submitted in English, the authors should provide an adequated version. The SCIENTIFIC COMMUNICATION is a category of scientific manuscript which describes a technique, an equipment, new species or observations and surveys of limited results. It has the same scientific rigor as the “Scientific Articles” and the same value as a publication. The classification of a manuscript as a SCIENTIFIC COMMUNICATION is based on its content and scientific merit but it can be a preliminary study, simple and not definitive on a certain subject, with publication justified by its uniqueness and contribution to the area. The Editorial Board of the JSS may invite leading authors of recognized reputation to compose specific Review Articles covering topics of their specialization that will convey to the scientific community the state-of-the-art knowledge related to the specific theme.
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