Aqueous pathways dominate permeation of solutes across <i>Pisum sativum</i> seed coats and mediate solute transport via diffusion and bulk flow of water

Niemann, Sylvia; Burghardt, Markus; Popp, Christian; Riederer, Markus

doi:10.1111/pce.12035

Cited by 10 publications

(12 citation statements)

References 48 publications

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“…These domains have been mainly ascribed to cutin ( Schönherr and Huber, 1977 ; Becker et al, 1986 ), phenolic compounds ( Luque et al, 1995a ) or polysaccharides ( Chamel et al, 1991 ; Domínguez and Heredia, 1999b ). The supposed localization of polysaccharides only in inner cuticle regions led to the suggestion that ‘polar pores’ cross the cuticle to explain the transport of polar substances and electrolytes through the cuticle ( Hull, 1970 ; Schönherr, 1976 , 2000 ; Schönherr and Schreiber, 2004 ; Schreiber, 2005 ; Niemann et al, 2013 ). However, the existence of such ‘pores’ has not been demonstrated by microscopic means so far and the occurrence of pores as such seems unlikely given the ultrastructure of the cuticle as observed by TEM ( Figure 3 and see TEM micrograph compilation by Jeffree, 2006 ) of many plant cuticles reported so far ( Fernández and Eichert, 2009 ).…”

Section: Back To the Beginning: A Critical Examination Of The Prevailmentioning

confidence: 99%

Cuticle Structure in Relation to Chemical Composition: Re-assessing the Prevailing Model

et al. 2016

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The surface of most aerial plant organs is covered with a cuticle that provides protection against multiple stress factors including dehydration. Interest on the nature of this external layer dates back to the beginning of the 19th century and since then, several studies facilitated a better understanding of cuticular chemical composition and structure. The prevailing undertanding of the cuticle as a lipidic, hydrophobic layer which is independent from the epidermal cell wall underneath stems from the concept developed by Brongniart and von Mohl during the first half of the 19th century. Such early investigations on plant cuticles attempted to link chemical composition and structure with the existing technologies, and have not been directly challenged for decades. Beginning with a historical overview about the development of cuticular studies, this review is aimed at critically assessing the information available on cuticle chemical composition and structure, considering studies performed with cuticles and isolated cuticular chemical components. The concept of the cuticle as a lipid layer independent from the cell wall is subsequently challenged, based on the existing literature, and on new findings pointing toward the cell wall nature of this layer, also providing examples of different leaf cuticle structures. Finally, the need for a re-assessment of the chemical and structural nature of the plant cuticle is highlighted, considering its cell wall nature and variability among organs, species, developmental stages, and biotic and abiotic factors during plant growth.

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Section: Back To the Beginning: A Critical Examination Of The Prevailmentioning

confidence: 99%

Cuticle Structure in Relation to Chemical Composition: Re-assessing the Prevailing Model

et al. 2016

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“…Given that the penetration of the cuticle is generally considered to be the rate-limiting step for foliar nutrition, several hypotheses about the penetration of nutrient via the cuticle have been raised (Fernández et al, 2016 ). For instance, there is evidence, although still not extensive, that polar paths of diffusion across cuticles exist (Niemann et al, 2013 ). Ionic compounds use aqueous polar paths of diffusion, whereas lipophilic molecules diffuse along the lipophilic wax and cutin domains (Schreiber, 2005 ).…”

Section: Canopy Fertilization In Fruit Trees In General: Fe Deficiencmentioning

confidence: 99%

Foliar Nutrition, Biostimulants and Prime-Like Dynamics in Fruit Tree Physiology: New Insights on an Old Topic

2017

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Despite the fact that the usage of foliar nutrients has long history, many aspects of fertilization through leaves are still unknown. Herein, we review the current knowledge regarding the canopy fertilization putting special emphasis on Fe nutrition and briefly provide insights into the nanofertilizer technology of the foliar feeding of fruit crops. In addition, this paper discusses the main aspects of the foliar application of biostimulants regarding crucial factors of fruit cropping systems, such as fruit yield/size, tolerance to environmental stresses, and nutrient availability. Also, we specifically discuss the role of hydrogen peroxide (H2O2) and nitric oxide (NO) as priming molecules and their possible cross-talk with biostimulants in fruit tree physiology. Finally, a view of the key issues for future fundamental and applied research in the topic is put forward.

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“…Alternatively, systemic chemicals can be taken up by seeds and diffuse through the seed covering layers to the embryo and then translocated into shoot tissue, termed the seed pathway. Before visible germination (radicle emergence), compounds can only be taken up by seed pathway during imbibition, and the permeation of these materials across seed coats is dominated by aqueous pathways and mediated by diffusion and bulk flow of water 4 . There are two pathways for water movement into corn seeds during imbibition: the black layer and pericarp 5 .…”

Section: Introductionmentioning

confidence: 99%

Uptake and translocation of imidacloprid via seed pathway and root pathway during early seedling growth of corn

Tang

Hao

Yuan

et al. 2020

Pest Management Science

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BACKGROUND: A systemic seed treatment can be taken up into shoot tissues during early corn seedling growth. However, the pathway that a systemic compound is taken up, either from seed or root uptake to shoot tissues is not fully understood. To study the single contributions of seed pathway and root pathway for the uptake and translocation of imidacloprid seed treatment, two methods were developed: A seed treatment method and a growing media/hydroponic solution delivery method. The seed treatment method employed a live and dead seed separated with plastic wrap to provide a barrier. The growing media/ hydroponic solution delivery method quantified the capacity for uptake by seeds and roots. RESULTS: The seed pathway transported 1.9-2.5 times more imidacloprid into shoot tissues when compared to the root pathway at the same dosage rate. The higher amount of imidacloprid taken up and translocated by the seed pathway was attributed to the fact that the corn seeds were in direct contact with high provided concentrations of imidacloprid. However, the root pathway showed 7.9-9.5 times higher capacity for transporting imidacloprid into shoot tissues when compared with the seed pathway. Whenever imidacloprid was taken up by seed or root, amounts of imidacloprid were measured in both tissues of seed and root. CONCLUSION: The seed pathway transported more imidacloprid than the root pathway during early seedling growth since corn seeds were contacted by higher concentrations of imidacloprid. Both seed pathway and root pathway were occurring concurrently during early seedling growth of corn.

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Aqueous pathways dominate permeation of solutes across Pisum sativum seed coats and mediate solute transport via diffusion and bulk flow of water

Cited by 10 publications

References 48 publications

Cuticle Structure in Relation to Chemical Composition: Re-assessing the Prevailing Model

Cuticle Structure in Relation to Chemical Composition: Re-assessing the Prevailing Model

Foliar Nutrition, Biostimulants and Prime-Like Dynamics in Fruit Tree Physiology: New Insights on an Old Topic

Uptake and translocation of imidacloprid via seed pathway and root pathway during early seedling growth of corn

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