Potential implications to wheat establishment due to negative effects of Eragrostis plana rhizospheric soil
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Agronomy, Universidade Federal da Fronteira Sul, Brazil
Biology, Universidade Federal da Fronteira Sul, Brazil
Biology, Universidade Estadual de Maringá, Brazil
Agronomy, Universidade Tecnológica Federal do Paraná, Brazil
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Henrique von Hertwig Bittencourt   

Agronomy, Universidade Federal da Fronteira Sul, BR-158, Km 405, S/N, 85301-970, Laranjeiras do Sul, Brazil
Submission date: 2022-06-08
Acceptance date: 2022-08-29
Online publication date: 2022-09-09
  • - There is seasonality in the influence of the rhizospheric soil on the germination and initial development of seedlings;
  • - The distance of the rhizospheric soil to plant donor tiller base is critical for the germination and seedling development;
  • - The position of the rhizospheric soil and the season can influence the number of abnormal seedlings and dormant wheat seeds, as well as the size of the seedlings.
Exotic plants, such as Eragrostis plana in southern Brazil, may cause significant problems in agriculture. This study aimed to elucidate the influence of E. plana rhizosphere soil on wheat germination and initial development. Bioassays with soil sampled from an infested agroecosystem were carried out using wheat as the target species. A factorial design was used, crossing soil from the horizontal and vertical distances from the E. plana tiller base and considering seasons as a blocking factor. The interaction between season and vertical and horizontal soil positions influenced normal wheat seed germination, with the lowest values (69%) observed in the winter bottom and intermediate soil positions. The highest abnormal seedling percentage (17.6%) was recorded in the summer middle vertical soil position. Dormant wheat seeds were higher (7%) in the spring bottom and distal soil positions. The season was the most important factor for germination, but hypocotyl, radicle, and total wheat seedling length also varied according to soil position. Shorter hypocotyls and seedlings were registered in the summer soil surface, while shorter radicles were observed in the proximal horizontal soil position in the same season. This variable response of wheat germination and seedling development to the infested soil demonstrated E. plana seasonality. The influence also varied according to the distance from the plant tiller base. These findings may be used to improve E. plana management in infested fields and to understand the mechanism of action of its allelochemicals in future research.
The authors have declared that no conflict of interests exist.