The Floral Nectary of Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Structural Aspects During Floral Development
Identifieur interne : 002098 ( Main/Exploration ); précédent : 002097; suivant : 002099The Floral Nectary of Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Structural Aspects During Floral Development
Auteurs : Elder Antonio Sousa Paiva [Brésil] ; Silvia Rodrigues Machado [Brésil]Source :
- Annals of Botany [ 0305-7364 ] ; 2008-01.
Abstract
Background and Aims Considering that few studies on nectary anatomy and ultrastructure are available for chiropterophilous flowers and the importance of Hymenaea stigonocarpa in natural cerrado communities, the present study sought to analyse the structure and cellular modifications that take place within its nectaries during the different stages of floral development, with special emphasis on plastid dynamics. Methods For the structural and ultrastructural studies the nectary was processed as per usual techniques and studied under light, scanning and transmission electron microscopy. Histochemical tests were employed to identify the main metabolites on nectary tissue and secretion samples. Key Results The floral nectary consists of the inner epidermis of the hypanthium and vascularized parenchyma. Some evidence indicates that the nectar release occurs via the stomata. The high populations of mitochondria, and their juxtaposition with amyloplasts, seem to be related to energy needs for starch hydrolysis. Among the alterations observed during the secretory phase, the reduction in the plastid stromatic density and starch grain size are highlighted. When the secretory stage begins, the plastid envelope disappears and a new membrane is formed, enclosing this region and giving rise to new vacuoles. After the secretory stage, cellular structures named extrastomatic bodies were observed and seem to be related to the nectar resorption. Conclusions Starch hydrolysis contributes to nectar formation, in addition to the photosynthates derived directly from the phloem. In these nectaries, the secretion is an energy-requiring process. During the secretion stage, some plastids show starch grain hydrolysis and membrane rupture, and it was observed that the region previously occupied by this organelle continued to be reasonably well defined, and gave rise to new vacuoles. The extrastomatic bodies appear to be related to the resorption of uncollected nectar.
Url:
- https://api.istex.fr/document/15585CC8C68EBF89801BA9CCF8CF42BBE0859F3F/fulltext/pdf
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701834
DOI: 10.1093/aob/mcm268
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001075
- to stream Istex, to step Curation: 001075
- to stream Istex, to step Checkpoint: 000534
- to stream Pmc, to step Corpus: 000C18
- to stream Pmc, to step Curation: 000C17
- to stream Pmc, to step Checkpoint: 001103
- to stream Ncbi, to step Merge: 000745
- to stream Ncbi, to step Curation: 000745
- to stream Ncbi, to step Checkpoint: 000745
- to stream Main, to step Merge: 002160
- to stream Main, to step Curation: 002098
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>The Floral Nectary of Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Structural Aspects During Floral Development</title>
<author><name sortKey="Paiva, Elder Antonio Sousa" sort="Paiva, Elder Antonio Sousa" uniqKey="Paiva E" first="Elder Antonio Sousa" last="Paiva">Elder Antonio Sousa Paiva</name>
</author>
<author><name sortKey="Machado, Silvia Rodrigues" sort="Machado, Silvia Rodrigues" uniqKey="Machado S" first="Silvia Rodrigues" last="Machado">Silvia Rodrigues Machado</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:15585CC8C68EBF89801BA9CCF8CF42BBE0859F3F</idno>
<date when="2008" year="2008">2008</date>
<idno type="doi">10.1093/aob/mcm268</idno>
<idno type="url">https://api.istex.fr/document/15585CC8C68EBF89801BA9CCF8CF42BBE0859F3F/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">001075</idno>
<idno type="wicri:Area/Istex/Curation">001075</idno>
<idno type="wicri:Area/Istex/Checkpoint">000534</idno>
<idno type="wicri:doubleKey">0305-7364:2008:Paiva E:the:floral:nectary</idno>
<idno type="wicri:source">PMC</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701834</idno>
<idno type="RBID">PMC:2701834</idno>
<idno type="wicri:Area/Pmc/Corpus">000C18</idno>
<idno type="wicri:Area/Pmc/Curation">000C17</idno>
<idno type="wicri:Area/Pmc/Checkpoint">001103</idno>
<idno type="wicri:Area/Ncbi/Merge">000745</idno>
<idno type="wicri:Area/Ncbi/Curation">000745</idno>
<idno type="wicri:Area/Ncbi/Checkpoint">000745</idno>
<idno type="wicri:doubleKey">0305-7364:2007:Paiva E:the:floral:nectary</idno>
<idno type="wicri:Area/Main/Merge">002160</idno>
<idno type="wicri:Area/Main/Curation">002098</idno>
<idno type="wicri:Area/Main/Exploration">002098</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a">The Floral Nectary of Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Structural Aspects During Floral Development</title>
<author><name sortKey="Paiva, Elder Antonio Sousa" sort="Paiva, Elder Antonio Sousa" uniqKey="Paiva E" first="Elder Antonio Sousa" last="Paiva">Elder Antonio Sousa Paiva</name>
<affiliation wicri:level="4"><country xml:lang="fr">Brésil</country>
<wicri:regionArea>Departamento de Botnica, Instituto de Cincias Biolgicas, Universidade Federal de Minas Gerais, 31270-901-Belo Horizonte, MG</wicri:regionArea>
<placeName><region type="state">Minas Gerais</region>
<settlement type="city">Belo Horizonte</settlement>
</placeName>
<orgName type="university">Université fédérale du Minas Gerais</orgName>
</affiliation>
<affiliation wicri:level="1"><country wicri:rule="url">Brésil</country>
</affiliation>
</author>
<author><name sortKey="Machado, Silvia Rodrigues" sort="Machado, Silvia Rodrigues" uniqKey="Machado S" first="Silvia Rodrigues" last="Machado">Silvia Rodrigues Machado</name>
<affiliation wicri:level="2"><country xml:lang="fr">Brésil</country>
<wicri:regionArea>Departamento de Botnica, Instituto de Biocincias, UNESP-Universidade Estadual Paulista, CP 510, 18618-000-Botucatu, SP</wicri:regionArea>
<placeName><region type="state">État de São Paulo</region>
</placeName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Annals of Botany</title>
<idno type="ISSN">0305-7364</idno>
<idno type="eISSN">1095-8290</idno>
<imprint><publisher>Oxford University Press</publisher>
<date type="published" when="2008-01">2008-01</date>
<biblScope unit="volume">101</biblScope>
<biblScope unit="issue">1</biblScope>
<biblScope unit="page" from="125">125</biblScope>
<biblScope unit="page" to="133">133</biblScope>
</imprint>
<idno type="ISSN">0305-7364</idno>
</series>
<idno type="istex">15585CC8C68EBF89801BA9CCF8CF42BBE0859F3F</idno>
<idno type="DOI">10.1093/aob/mcm268</idno>
<idno type="ArticleID">mcm268</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0305-7364</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract">Background and Aims Considering that few studies on nectary anatomy and ultrastructure are available for chiropterophilous flowers and the importance of Hymenaea stigonocarpa in natural cerrado communities, the present study sought to analyse the structure and cellular modifications that take place within its nectaries during the different stages of floral development, with special emphasis on plastid dynamics. Methods For the structural and ultrastructural studies the nectary was processed as per usual techniques and studied under light, scanning and transmission electron microscopy. Histochemical tests were employed to identify the main metabolites on nectary tissue and secretion samples. Key Results The floral nectary consists of the inner epidermis of the hypanthium and vascularized parenchyma. Some evidence indicates that the nectar release occurs via the stomata. The high populations of mitochondria, and their juxtaposition with amyloplasts, seem to be related to energy needs for starch hydrolysis. Among the alterations observed during the secretory phase, the reduction in the plastid stromatic density and starch grain size are highlighted. When the secretory stage begins, the plastid envelope disappears and a new membrane is formed, enclosing this region and giving rise to new vacuoles. After the secretory stage, cellular structures named extrastomatic bodies were observed and seem to be related to the nectar resorption. Conclusions Starch hydrolysis contributes to nectar formation, in addition to the photosynthates derived directly from the phloem. In these nectaries, the secretion is an energy-requiring process. During the secretion stage, some plastids show starch grain hydrolysis and membrane rupture, and it was observed that the region previously occupied by this organelle continued to be reasonably well defined, and gave rise to new vacuoles. The extrastomatic bodies appear to be related to the resorption of uncollected nectar.</div>
</front>
</TEI>
<affiliations><list><country><li>Brésil</li>
</country>
<region><li>Minas Gerais</li>
<li>État de São Paulo</li>
</region>
<settlement><li>Belo Horizonte</li>
</settlement>
<orgName><li>Université fédérale du Minas Gerais</li>
</orgName>
</list>
<tree><country name="Brésil"><region name="Minas Gerais"><name sortKey="Paiva, Elder Antonio Sousa" sort="Paiva, Elder Antonio Sousa" uniqKey="Paiva E" first="Elder Antonio Sousa" last="Paiva">Elder Antonio Sousa Paiva</name>
</region>
<name sortKey="Machado, Silvia Rodrigues" sort="Machado, Silvia Rodrigues" uniqKey="Machado S" first="Silvia Rodrigues" last="Machado">Silvia Rodrigues Machado</name>
<name sortKey="Paiva, Elder Antonio Sousa" sort="Paiva, Elder Antonio Sousa" uniqKey="Paiva E" first="Elder Antonio Sousa" last="Paiva">Elder Antonio Sousa Paiva</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Bois/explor/OrangerV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002098 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002098 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Bois |area= OrangerV1 |flux= Main |étape= Exploration |type= RBID |clé= ISTEX:15585CC8C68EBF89801BA9CCF8CF42BBE0859F3F |texte= The Floral Nectary of Hymenaea stigonocarpa (Fabaceae, Caesalpinioideae): Structural Aspects During Floral Development }}
This area was generated with Dilib version V0.6.25. |