Histological and Biochemical Characterization of Adventitious Root Formation in Walnut Cotyledon Fragments

Duroux, Laurent; Fontaine, F; Breton, Catherine; Charpentier, Jean-Paul; Doumas, Patrick; Jay‐Allemand, Christian

doi:10.1007/978-1-4615-5403-5_11

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…In agreement with the present results, 5-hydroxy-1,4-naphthoquinone induced ARF in Morus sp. shoots in vitro [30] and was related to in vitro rooting of walnut [31], suggesting a consistent favorable effect for several species. Nevertheless, 5-hydroxy-1,4-naphthoquinone is a known allelopathetic factor that can induce the production of reactive oxygen species (ROS), such as H 2 O 2 [32], the application of which can increase rooting in Prunus cuttings [33], whereas its scavenging can inhibit rooting [34].…”

Section: Discussionmentioning

confidence: 72%

Dopamine, Chlorogenic Acid, and Quinones as Possible Cofactors of Increasing Adventitious Rooting Potential of In Vitro Krymsk 5 Cherry Rootstock Explants

Tsafouros

Roussos

2022

Agronomy

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In the present study, the effect of some not commonly used phenolic compounds was evaluated during the in vitro rooting stage of the cherry rootstock ‘Krymsk 5′ (P. fruticosa × P. lannesiana), in the absence or presence of auxin. Two sets of experiments were conducted. In the first set, the following substances were tested: the o-diphenol chlorogenic acid, in five concentrations (0 μΜ, 0.5 μΜ, 1 μΜ, 5 μΜ, and 50 μΜ) in the presence of a suboptimal indolebutyric acid (IBA) concentration (5 μΜ), the catecholamine dopamine in five concentrations (0 μΜ, 0.5 μΜ, 1 μΜ, 5 μΜ, and 50 μΜ), and the quinone 5-hydroxy-1,4-naphthoquinone in four concentrations (0 μΜ, 0.25 μΜ, 1 μΜ, and 5 μΜ) in the absence or presence of 5 μΜ IBA. In the second experiment, the quinones p-benzoquinone; 1,4-napthoquinone; and 2-hydroxy-1,4-naphthoquinone were tested in four concentrations (0 μΜ, 5 μΜ, 50 μΜ, and 100 μΜ) in the presence of 5 μΜ IBA. An application of 5 μΜ of 5-hydroxy-1,4-naphthoquinone in the auxin-free medium increased rooting potential almost 1.7 times. Rooting percentage was also enhanced up to 4.2 times by dopamine; chlorogenic acid; 5-hydroxy-1,4-naphthoquinone; p-benzoquinone; and 1,4 napthoquinone in the presence of IBA. The present results indicate a possible promotive role of quinones and dopamine during in vitro rooting, at least for Prunus species, and their potential use as rooting cofactors. Moreover, a possible mode of action of the compounds studied related to IAA-oxidase is discussed.

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Section: Discussionmentioning

confidence: 72%

Dopamine, Chlorogenic Acid, and Quinones as Possible Cofactors of Increasing Adventitious Rooting Potential of In Vitro Krymsk 5 Cherry Rootstock Explants

Tsafouros

Roussos

2022

Agronomy

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“…Once converted into plantlets, GUS activities could not be observed due to instant and massive darkening of the root tissues in the reaction solution (not shown). These strong oxidation reactions could be linked to important flavonoid and naphtoquinone accumulation in developing roots in this species [26,27].…”

Section: Walnut Tree Somatic Embryo Transformationmentioning

confidence: 96%

Overexpression of MADS-box Gene AGAMOUS-LIKE 12 Activates Root Development in Juglans sp. and Arabidopsis thaliana

Montiel

Gaudet

Laurans

et al. 2020

Plants

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Until recently, the roles of plant MADS-box genes have mainly been characterized during inflorescence and flower differentiation. In order to precise the roles of AGAMOUS-LIKE 12, one of the few MADS-box genes preferentially expressed in roots, we placed its cDNA under the control of the double 35S CaMV promoter to produce transgenic walnut tree and Arabidopsis plants. In Juglans sp., transgenic somatic embryos showed significantly higher germination rates but abnormal development of their shoot apex prevented their conversion into plants. In addition, a wide range of developmental abnormalities corresponding to ectopic root-like structures affected the transgenic lines suggesting partial reorientations of the embryonic program toward root differentiation. In Arabidopsis, AtAGL12 overexpression lead to the production of faster growing plants presenting dramatically wider and shorter root phenotypes linked to increased meristematic cell numbers within the root apex. In the upper part of the roots, abnormal cell divisions patterns within the pericycle layer generated large ectopic cell masses that did not prevent plants to grow. Taken together, our results confirm in both species that AGL12 positively regulates root meristem cell division and promotes overall root vascular tissue formation. Genetic engineering of AGL12 expression levels could be useful to modulate root architecture and development.

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In vitro organogenesis of chestnut (Castanea sativa Mill.) cotyleodon explants: responses to growth regulators and developmental aspects

Giovannelli

Giannini²,

Bennici

et al. 2004

In Vitro Cell. Dev. Biol. - Plant

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Histological and Biochemical Characterization of Adventitious Root Formation in Walnut Cotyledon Fragments

Cited by 4 publications

References 14 publications

Dopamine, Chlorogenic Acid, and Quinones as Possible Cofactors of Increasing Adventitious Rooting Potential of In Vitro Krymsk 5 Cherry Rootstock Explants

Dopamine, Chlorogenic Acid, and Quinones as Possible Cofactors of Increasing Adventitious Rooting Potential of In Vitro Krymsk 5 Cherry Rootstock Explants

Overexpression of MADS-box Gene AGAMOUS-LIKE 12 Activates Root Development in Juglans sp. and Arabidopsis thaliana

In vitro organogenesis of chestnut (Castanea sativa Mill.) cotyleodon explants: responses to growth regulators and developmental aspects

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