Identificação de fungos endofíticos em miniestacas de acácia-negra

Duin, Izabela Moura; Coelho, Thiare Aparecida do Valle; Poitevin, Carolina Gracia; Santos, Á. F. dos; Pimentel, Ida Chapaval; Auer, Celso Garcia

doi:10.1590/0100-5405/180656

Summa phytopathol.

2018

DOI: 10.1590/0100-5405/180656

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Identificação de fungos endofíticos em miniestacas de acácia-negra

Izabela Moura Duin

Thiare Aparecida do Valle Coelho

Carolina Gracia Poitevin

et al.

Abstract: RESUMO Fungos endofíticos podem ter várias relações com mudas de plantas, desde a patogênese até a proteção e estímulo ao crescimento. O objetivo deste estudo foi isolar e identificar fungos endofíticos em miniestacas de acácia-negra. Miniestacas assintomáticas foram avaliadas e seis espécies de fungos endofíticos foram isoladas e identificadas.

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2024

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Histological study of adventitious rooting in Acacia mearnsii and Ilex paraguariensis mini-cuttings: insights into the so-called anatomical barrier

Oliveira,

Bisognin,

Muniz

et al. 2024

Rodriguésia

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Acacia mearnsii and Ilex paraguariensis are tree species of great social and economic importance in Brazil, demanding clonal cultivars. Their shoots possess a reservoir of totipotent cells with suitable potential for adventitious rooting, essential for mass production of high-quality seedlings. This study aimed to gain new insights into how anatomical barriers, i.e. sclerified tissues in the cortical region, may affect the adventitious rooting of cuttings from these species through histological examinations. For both species, histological analysis revealed significant diagnostic features. Tissue decay appears to be equivalent to an anatomical barrier in A. mearnsii. Starch abundance was notable in clones with higher rooting competence of I. paraguariensis, but they were not observed in the fundamental tissues of A. mearnsii, regardless of the rooting competence of the clone. The main differences in adventitious rooting were associated with the speed of response, initiated from cortical meristems, followed by differentiation of conductive tissue from newly formed tissue, connecting the periphery with the secondary vascular tissue. Thus, this newly formed tissue with parenchymatic structure provides the necessary structural basis for radial vascular connections. For both studied species, rhizogenesis presents distinct barriers to rooting, nevertheless these are not necessarily of anatomical nature.

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Histological study of adventitious rooting in Acacia mearnsii and Ilex paraguariensis mini-cuttings: insights into the so-called anatomical barrier

Oliveira,

Bisognin,

Muniz

et al. 2024

Rodriguésia

View full text Add to dashboard Cite

show abstract

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Identificação de fungos endofíticos em miniestacas de acácia-negra

Cited by 1 publication

References 6 publications

Histological study of adventitious rooting in Acacia mearnsii and Ilex paraguariensis mini-cuttings: insights into the so-called anatomical barrier

Histological study of adventitious rooting in Acacia mearnsii and Ilex paraguariensis mini-cuttings: insights into the so-called anatomical barrier

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