Intercellular pectic protuberances in Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Occurrence and functional aspects

Paiva, Élder Antônio Sousa; Machado, Sílvia Rodrigues

doi:10.1016/j.crvi.2008.02.003

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…This reasoning is corroborated by the position that IPs occupy, the intercellular space of the middle lamella, as well as by the pectic composition and the structural similarity between IPs and cell wall. This type of origin has also been suggested for other species by Potgieter and Van Wyk (1992), Tiné et al (2000), and Paiva and Machado (2008).…”

Section: Discussionsupporting

confidence: 76%

“…Regarding their origin, evidence suggest that IPs are formed through fr agmentation of the middle lamella pectin (Paiva & Machado, 2008;Potgieter & Van Wyk, 1992;Tiné et al, 2000) during the formation of intercellular spaces (Evert, 2006) or incorporation of substances deposited after intercellular spaces are formed (Leroux et al, 2007). Stress factors such as nutritional deficiency (Veys, Lejeune, & Van Hove, 2002), injury (Davies & Lewis, 1981), grafting (Jeffree, Dale, & Fry, 1986) and fungal infection (Scheidegger, Günthardt-Goerg, Matyssek, & HatVani, 1991) have also been pointed out to contribute to IPs formation.…”

Section: Introductionmentioning

confidence: 99%

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Structure and chemical nature of intercellular protuberances in Dennstaedtiaceae rhizomes (Polypodiopsida)

Viana

Schwartsburd

Azevedo

2023

Acta Sci. Biol. Sci.

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Intercellular protuberances (IPs) are projections on the cell surface and have been reported for families of ferns, Gymnosperms, and Angiosperms. Data on the type, chemical composition, and distribution of these structures among vascular plants are still scarce. Here, we investigate the occurrence, distribution, type of IPs among species of eight Dennstaedtiaceae genera and verify the taxonomic significance of these protuberances in the family. Rhizomes of 23 species of Dennstaedtiaceae from field and herbaria collections were analyzed by light microscopy and scanning electron microscopy. Histochemical tests were performed to identify the main classes of IPs chemical compounds. Two types of IPs were observed in Dennstaedtiaceae species: strand and filament types. They were observed in the intercellular spaces of the parenchyma in the cortex and pith regions. Overall, protuberances are irregularly shaped, with angustate or spheroidal apices. Their polysaccharide nature and pectic constitution were confirmed by histochemical tests. Concerning Pteridium arachnoideum (Kaulf.) Maxon subsp. arachnoideum, IPs have confirmed phenolic composition. Evidence indicates that IPs in Dennstaedtiaceae originate from the fragmentation of the middle lamella and that they have a structural function as well as protection against pathogens. In lateral-line aerenchyma, the occurrence of filament-type IPs may be related to the larger intercellular spacing in the cortex region, providing greater mechanical resistance. We have expanded the data on the occurrence of IPs in the Dennstaedtiaceae, which appear to be notable characters for the family. Moreover, the data presented herein confirmed the polysaccharide and pectic nature of these structures. However, we were unable to find links between IPs and taxonomy and evolution of the Dennstaedtiaceae. On the other hand, different IPs types were identified between the clades Dennstaedtioideae (strand-type IPs) and Hypolepidoideae (filament-type IPs, with exceptions).

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Structure and chemical nature of intercellular protuberances in Dennstaedtiaceae rhizomes (Polypodiopsida)

Viana

Schwartsburd

Azevedo

2023

Acta Sci. Biol. Sci.

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“…A special feature in the ICS was the presence of foam-like protuberances. In general, pectic protuberances can be found in many different species across all vascular plants, including ferns, and can be of various shapes (Potgieter and Van Wyk 1992 ), and shape variability is likely to be due to the nature of cell wall separation (Paiva and Machado 2008 ; Carr et al 1980 ). In our case, protuberances formed irregular strands in the cell corner connecting opposite cells.…”

Section: Discussionmentioning

confidence: 99%

The walnut shell network: 3D visualisation of symplastic and apoplastic transport routes in sclerenchyma tissue

Antreich

Huss

Xiao

et al. 2022

Planta

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Main conclusion High symplastic connectivity via pits was linked to the lignification of the developing walnut shell. With maturation, this network lessened, whereas apoplastic intercellular space remained and became relevant for shell drying. Abstract The shell of the walnut (Juglans regia) sclerifies within several weeks. This fast secondary cell wall thickening and lignification of the shell tissue might need metabolites from the supporting husk tissue. To reveal the transport capacity of the walnut shell tissue and its connection to the husk, we visualised the symplastic and apoplastic transport routes during shell development by serial block face-SEM and 3D reconstruction. We found an extensive network of pit channels connecting the cells within the shell tissue, but even more towards the husk tissue. Each pit channel ended in a pit field, which was occupied by multiple plasmodesmata passing through the middle lamella. During shell development, secondary cell wall formation progressed towards the interior of the cell, leaving active pit channels open. In contrast, pit channels, which had no plasmodesmata connection to a neighbouring cell, got filled by cellulose layers from the inner cell wall lamellae. A comparison with other nut species showed that an extended network during sclerification seemed to be linked to high cell wall lignification and that the connectivity between cells got reduced with maturation. In contrast, intercellular spaces between cells remained unchanged during the entire sclerification process, allowing air and water to flow through the walnut shell tissue when mature. The connectivity between inner tissue and environment was essential during shell drying in the last month of nut development to avoid mould formation. The findings highlight how connectivity and transport work in developing walnut shell tissue and how finally in the mature state these structures influence shell mechanics, permeability, conservation and germination.

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Ultrastructure and development of the floral nectary from Borago officinalis L. and phytochemical changes in its secretion

Gismondi,

Di Marco,

Canuti

et al. 2024

Plant Science

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Intercellular pectic protuberances in Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Occurrence and functional aspects

Cited by 3 publications

References 25 publications

Structure and chemical nature of intercellular protuberances in Dennstaedtiaceae rhizomes (Polypodiopsida)

Structure and chemical nature of intercellular protuberances in Dennstaedtiaceae rhizomes (Polypodiopsida)

The walnut shell network: 3D visualisation of symplastic and apoplastic transport routes in sclerenchyma tissue

Ultrastructure and development of the floral nectary from Borago officinalis L. and phytochemical changes in its secretion

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