Seed morphobiometry, morphology of germination and emergence of quinoa seeds 'BRS Piabiru'.

Daniele B Rodrigues,Camila A Nunes,Luis Henrique Konzen,Andreia S Almeida,Ana Flávia A Serrão,Lilian V.M De Tunes,Jefferson A Cavalcante,Anna S Suñé

doi:10.1590/0001-3765202020181313

Daniele B Rodrigues, Camila A Nunes + Show 6 more

Open Access

https://doi.org/10.1590/0001-3765202020181313

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Abstract

Quinoa, classified as a pseudocereal, presents greater nutritional value compared to traditional cereals. Considering the potential for cultivation presented by the species and the benefits of studying plant morphology and morphobiometry, this paper describes seed and seedling morphobiometric characteristics of quinoa (Chenopodium quinoa Willd.) cultivar BRS Piabiru during germination and emergence. To evaluate seed morphobiometry the 1000-seeds weight, moisture content, seed morphological characterization and the tetrazolium test were performed. The morphological characterization of germination and seedling emergence were performed by periodic observations during the development, allowing the description using pictures and drawings. Quinoa seeds cv. BRS Piabiru present an average diameter of 2.05 mm and 1.07 width. 1000-seeds weight of 2.68 g and moisture content of 11%. Externally, quinoa seeds present the pericarp as testa, the hilum and the raphe and, internally, the embryonic axis (cotyledons, radicle and hypocotyl-radicle), perisperm and endosperm. The germination is characterized as epigeal, phanerocotylar type, with radicle protrusion at 3 hours after sowing and complete formed seedlings at 24 hours after sowing. Emergence occurs at 9 days after sowing and plants are completely formed at 12 days after sowing.

Highlights

One of the most important fields of study in Botany is Plant Morphology, since this field of knowledge studies shapes and structures, enabling the understanding of seed morphological and ecophysiological characteristics, which are extremely relevant to comprehend the life cycle and growth of species (Lorenzi & Gonçalves 2011, Mourão et al 2002)
Considering the potential presented by quinoa and the benefits of plant morphology and morphobiometry, this paper describes seed and seedling morphobiometric characteristics of quinoa (Chenopodium quinoa Willd.) cultivar BRS Piabiru during germination and emergence
Quinoa seeds presented an average diameter of 2.05 mm and average width of 1.07 mm, characterized as a round and flat seed

Summary

INTRODUCTION

One of the most important fields of study in Botany is Plant Morphology, since this field of knowledge studies shapes and structures, enabling the understanding of seed morphological and ecophysiological characteristics, which are extremely relevant to comprehend the life cycle and growth of species (Lorenzi & Gonçalves 2011, Mourão et al 2002) These studies may allow to improve the evaluation of natural regeneration of ecosystems, the analysis of biological cycles, management practices and the definition of strategies for the conservation of species and the development of efficient techniques for production (Batista et al 2011). Quinoa (Chenopodium quinoa Willd.) has been introduced less than 30 years in Brazil, there are few morphological studies about this species This pseudocereal presents a great potential for cultivation, production is limited due to some hindrances, such as, the availability of only one cultivar in the market (Spehar 2006). Considering the potential presented by quinoa and the benefits of plant morphology and morphobiometry, this paper describes seed and seedling morphobiometric characteristics of quinoa (Chenopodium quinoa Willd.) cultivar BRS Piabiru during germination and emergence

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSIONS