Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall
ABSTRACT The velamen, a root structure of some epiphytic species for water uptake, usually is stratified epidermis consisting of dead cells. In general, its cell walls exhibit variation during development, including in thickness and amount and type of impregnated substances. These changes result in...
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| Format: | Article |
| Language: | English |
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Sociedade Botânica do Brasil
2021-01-01
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| Series: | Acta Botânica Brasílica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400633&tlng=en |
| _version_ | 1830409248891207680 |
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| author | Luísa Gouveia Lana Ana Flávia de Melo Silva Aldineia Buss Denis Coelho de Oliveira Ana Silvia Franco Pinheiro Moreira |
| author_facet | Luísa Gouveia Lana Ana Flávia de Melo Silva Aldineia Buss Denis Coelho de Oliveira Ana Silvia Franco Pinheiro Moreira |
| author_sort | Luísa Gouveia Lana |
| collection | DOAJ |
| description | ABSTRACT The velamen, a root structure of some epiphytic species for water uptake, usually is stratified epidermis consisting of dead cells. In general, its cell walls exhibit variation during development, including in thickness and amount and type of impregnated substances. These changes result in diverse physical and chemical properties that can serve in water and nutrient uptake, as well as in mechanical support and protection. On this basis, the main objective of the current study was to describe the composition of the cell walls of the velamen during the development of the roots of four species of Cattleya. Anatomical, histochemical and immunocytochemical analyses were performed with samples (n=3 individuals per species) of meristematic, developing, and mature regions of the root. The development of the primary wall led to the deposition of pectins as highly methylesterified homogalacturonans, which were demetihylesterified with maturation of the velamen. The deposition of lipids (and subsequently lignins) in velamen cells marked a transition stage to the formation of the secondary wall, which gives rigidity to the tissue. For the first time, we showed that the deposition of lipids and lignins began close to the exodermis in the direction of the epivelamen. |
| first_indexed | 2024-12-20T19:10:02Z |
| format | Article |
| id | doaj.art-fe6d6a477eb0498c9597208800d084cd |
| institution | Directory Open Access Journal |
| issn | 1677-941X |
| language | English |
| last_indexed | 2024-12-20T19:10:02Z |
| publishDate | 2021-01-01 |
| publisher | Sociedade Botânica do Brasil |
| record_format | Article |
| series | Acta Botânica Brasílica |
| spelling | doaj.art-fe6d6a477eb0498c9597208800d084cd2022-12-21T19:29:15ZengSociedade Botânica do BrasilActa Botânica Brasílica1677-941X2021-01-0134463364410.1590/0102-33062020abb0140Early development of epiphytic roots: perspectives based on the composition of the velamen cell wallLuísa Gouveia Lanahttps://orcid.org/0000-0001-5843-8521Ana Flávia de Melo Silvahttps://orcid.org/0000-0003-0063-6212Aldineia Busshttps://orcid.org/0000-0003-0121-1080Denis Coelho de Oliveirahttps://orcid.org/0000-0002-6386-918XAna Silvia Franco Pinheiro Moreirahttps://orcid.org/0000-0001-5090-5527ABSTRACT The velamen, a root structure of some epiphytic species for water uptake, usually is stratified epidermis consisting of dead cells. In general, its cell walls exhibit variation during development, including in thickness and amount and type of impregnated substances. These changes result in diverse physical and chemical properties that can serve in water and nutrient uptake, as well as in mechanical support and protection. On this basis, the main objective of the current study was to describe the composition of the cell walls of the velamen during the development of the roots of four species of Cattleya. Anatomical, histochemical and immunocytochemical analyses were performed with samples (n=3 individuals per species) of meristematic, developing, and mature regions of the root. The development of the primary wall led to the deposition of pectins as highly methylesterified homogalacturonans, which were demetihylesterified with maturation of the velamen. The deposition of lipids (and subsequently lignins) in velamen cells marked a transition stage to the formation of the secondary wall, which gives rigidity to the tissue. For the first time, we showed that the deposition of lipids and lignins began close to the exodermis in the direction of the epivelamen.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400633&tlng=enCattleyaOrchidaceaepectinsroot meristemvelamen development |
| spellingShingle | Luísa Gouveia Lana Ana Flávia de Melo Silva Aldineia Buss Denis Coelho de Oliveira Ana Silvia Franco Pinheiro Moreira Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall Acta Botânica Brasílica Cattleya Orchidaceae pectins root meristem velamen development |
| title | Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall |
| title_full | Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall |
| title_fullStr | Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall |
| title_full_unstemmed | Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall |
| title_short | Early development of epiphytic roots: perspectives based on the composition of the velamen cell wall |
| title_sort | early development of epiphytic roots perspectives based on the composition of the velamen cell wall |
| topic | Cattleya Orchidaceae pectins root meristem velamen development |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400633&tlng=en |
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