Effects of Eugenia dysenterica L. extracts on roots and gravitropism of Sesamum indicum L. and Raphanus sativus L.

Pereira, Luiz Alfredo Rodrigues; Piña, Grigna; Silveira, C E; Gomes, Suelí Maria; Toledo, Juliane Laner de; Borghetti, Fabian

doi:10.26651/2017-42-1-1102

Cited by 7 publications

(2 citation statements)

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“…In the root cap, there are special starch grains named statoliths, which are considered a gravity sensing structure (Zhang & Friml, 2020). The extract of a Brasilian tree cagaita ( Eugenia dysenterica ) was shown to interfere with the differentiation and position of statoliths in radish seedlings (Pereira et al, 2017). The number of starch grains in the root cap cells of tobacco seedlings also decreased when exposed to salt stress (Baranova et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Fallopia japonica and Fallopia × bohemica extracts cause ultrastructural and biochemical changes in root tips of radish seedlings

Šoln,

Žnidaršič,

Klemenčič

et al. 2023

Physiologia Plantarum

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Japanese knotweed (Fallopia japonica) and Bohemian knotweed (Fallopia × bohemica) are invasive plants that use allelopathy as an additional mechanism for colonization of the new habitat. Allelochemicals affect the growth of roots of neighboring plants. In the present study, we analyze the early changes associated with the inhibited root growth of radish seedlings exposed to aqueous extracts of knotweed rhizomes for 3 days. Here, we show that cells in the root cap treated with the knotweed extracts exhibited reduced cell length and displayed several ultrastructural changes, including the increased abundance of dilated ER cisternae filled with electron‐dense material (ER bodies) and the accumulation of dense inclusions. Moreover, mitochondrial damage was exhibited in the root cap and the meristem zone compared to the non‐treated radish seedlings. Furthermore, malfunction of the intracellular redox balance system was detected as the increased total antioxidative capacity. We also detected increased metacaspase‐like proteolytic activities and, in the case of 10% extract of F. japonica, increased caspase‐like proteolytic activities. These ultrastructural and biochemical effects could be the reason for the more than 60% shorter root length of treated radish seedlings compared to controls.

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Section: Discussionmentioning

confidence: 99%

Fallopia japonica and Fallopia × bohemica extracts cause ultrastructural and biochemical changes in root tips of radish seedlings

Šoln,

Žnidaršič,

Klemenčič

et al. 2023

Physiologia Plantarum

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“…These morphological changes and impaired gravitropism are consistent with the allelopathic responses elicited by other plants. Hence, similar morphological changes and in the gravitropic response were triggered by Eugenia dysenterica allelochemicals in radish and sesame seedlings (Pereira et al, 2017). Moreover, there is also consistency in the fact that roots are more sensitive to allelochemicals than shoots (Pina et al, 2009;Pereira et al, 2017).…”

Section: Leaf Extracts From Wt and Ggr Transgenic Arabidopsis Lines Imentioning

confidence: 93%

GGR (Geranylgeranyl Reductase) Expression Affects the Allelopathic Response to Arabidopsis Allelochemicals

Silva¹,

Toledo²,

Pierdoná³

et al. 2018

JAS

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Allelopathy involves the release of compounds into the environment that affects the growth and development of other organisms. This phenomenon may lead to the production of compounds less harmful to the environment than traditional herbicides used in weed control. In plants, terpenes have been identified as components of allelochemicals and are synthesized by enzymes named as geranylgeranyl diphosphate synthases (GGPPS). There are about 12 GGPPS genes in Arabidopsis, among which is GGR. This work aims to study the association between the expression levels of GGR and the allelopathic response of sesame seedlings to Arabidopsis leaf extracts. Hence, the GGR gene was inserted into Arabidopsis with the purpose to investigate the allelopathic effects of GGR expression levels on sesame seedlings. GGR expression levels were quantified by RT-PCR in both transgenic and non-transgenic [wild-type (WT)] lines. It has been observed that both wild-type and GGR expressing transgenic lines inhibited the growth of sesame seedlings. However, it is noteworthy that the phytotoxicity of extracts from GGR lines were greater than WT extracts. RT-PCR analysis of GGR expression revealed that WT plants had higher levels of GGR expression than GGR transgenic lines, which suggests that a homologous-dependent gene silencing (HDGS) occurred in GGR lines. GGR is part of an enzyme complex that works as a hub that determines the types of terpenes produced in Arabidopsis chloroplasts. The present data indicates that decreases in GGR expression may have favoured the production of terpenes with stronger allelopathic capacity in Arabidopsis leaves.

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Plant cell responses to allelopathy: from oxidative stress to programmed cell death

2022

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Effects of Eugenia dysenterica L. extracts on roots and gravitropism of Sesamum indicum L. and Raphanus sativus L.

Cited by 7 publications

References 0 publications

Fallopia japonica and Fallopia × bohemica extracts cause ultrastructural and biochemical changes in root tips of radish seedlings

Fallopia japonica and Fallopia × bohemica extracts cause ultrastructural and biochemical changes in root tips of radish seedlings

GGR (Geranylgeranyl Reductase) Expression Affects the Allelopathic Response to Arabidopsis Allelochemicals

Plant cell responses to allelopathy: from oxidative stress to programmed cell death

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