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The water path in plasma-treated Leucaena seeds

Published online by Cambridge University Press:  16 April 2020

Clodomiro Alves-Junior Open the ORCID record for Clodomiro Alves-Junior [Opens in a new window] ,
Dinnara L. S. da Silva ,
Jussier O. Vitoriano ,
Anne P. C. B. Barbalho  and
Regina C. de Sousa
Clodomiro Alves-Junior*
Affiliation:
Labplasma-Department of Exact and Natural Sciences, Federal Rural University of Semiarid, Mossoró, RN CEP: 59625-900, Brazil
Dinnara L. S. da Silva
Affiliation:
Center of Agricultural Sciences, State University of Piaui, Teresina, Brazil
Jussier O. Vitoriano
Affiliation:
Postgraduate Program in Mechanical Engineering, Federal University of Rio Grande do Norte, Natal, Brazil
Anne P. C. B. Barbalho
Affiliation:
Labplasma-Department of Exact and Natural Sciences, Federal Rural University of Semiarid, Mossoró, RN CEP: 59625-900, Brazil
Regina C. de Sousa
Affiliation:
Department of Physics, Federal University of Maranhão, São Luis, Brazil
*
Author for correspondence: Clodomiro Alves-Junior, E-mail: [email protected]
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Abstract

The effects of cold atmospheric plasma (CAP) of dielectric barrier discharges on the wettability, imbibition and germination of Leucaena leucocephala were investigated. It was established that CAP treatment markedly hydrophilized the seed coat, especially at longer treatment times. From the profile of the imbibition curve and visual observation, it was possible to verify that there are two resistance barriers to water penetration: integument surface and region of the macrosclereid cell wall (light line). Although the plasma interacts only in the integument, increasing the density of hydrophilic sites increases the capacity of water absorption, producing enough driving force to overcome the second resistance barrier. The existence of these two barriers changes the three-phase pattern generally observed during seed germination. Despite an increase in imbibition, the plasma treatment conditions used in this work, were not enough to overcome completely the dormancy barrier.

Keywords

bio-surfacescold atmospheric plasmamorpho-anatomyphysical dormancy
Type
Research Paper
Information
Seed Science Research , Volume 30 , Issue 1 , March 2020 , pp. 13 - 20
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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