PoplarV1, Main, Corpus, bibRecord, 000C78

Development, structure and evolutionary significance of seed appendages in Salix matsudana (Salicaceae).

Identifieur interne : 000C78 ( Main/Corpus ); précédent : 000C77; suivant : 000C79

Development, structure and evolutionary significance of seed appendages in Salix matsudana (Salicaceae).

Auteurs : Jianxia Li ; Xiaofei Xia ; Shenjian Xu ; Jiayue Wu ; Linlin Peng ; Liangcheng Zhao

Source :

PloS one [ 1932-6203 ] ; 2018.

RBID : pubmed:30180181

English descriptors

KwdEn :
- Biological Evolution (MeSH), Microscopy, Electron, Scanning (MeSH), Salix (anatomy & histology), Salix (growth & development), Salix (ultrastructure), Seeds (anatomy & histology), Seeds (growth & development), Seeds (ultrastructure).
MESH :
- anatomy & histology : Salix, Seeds.
- growth & development : Salix, Seeds.
- ultrastructure : Salix, Seeds.
- Biological Evolution, Microscopy, Electron, Scanning.

Abstract

The seeds of Salix and Populus (Salicaceae) are characterized by having numerous long hairs which loosely accompanying the seeds and a small annular appendage which surrounding the base of the seed along with tufted hairs. In this study, the complete development and detailed structure of the hairs and annular appendage in Salix matsudana were investigated using standard techniques for plant anatomy and histochemistry. The results show that the hairs originate successively from the single epidermal cells of the placenta (in megaspore mother cell phase) and funiculus (in eight-nucleate phase), and that their development consists of a progressive increase in cell size and an absence of cell division. The annular appendage is initiated from four to five rows of cells at the distal end of the funiculus in octant proembryo phase and its development is characterized by reactivated meristematic activity and a size increase of these cells. The initiation and development of the hairs are irrelevant to ovule development but fertilization and a developed embryo is necessary for the annular appendage to occur. Considering the reliable fossils, we inferred that the feature of seeds surrounded by long hairs is an ancestral character, and that the detachment of hairs from the funiculus and the occurrence of an annular appendage with tufts of hairs may be the more derived states for seed dispersal in Salix and Populus.

DOI: 10.1371/journal.pone.0203061
PubMed: 30180181
PubMed Central: PMC6122828

Links to Exploration step

pubmed:30180181

Le document en format XML

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<affiliation><nlm:affiliation>Lab of Systematic Evolution and Biogeography of Woody Plants, College of Nature Conservation, Beijing Forestry University, Beijing, China.</nlm:affiliation>
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<author><name sortKey="Xia, Xiaofei" sort="Xia, Xiaofei" uniqKey="Xia X" first="Xiaofei" last="Xia">Xiaofei Xia</name>
<affiliation><nlm:affiliation>Beijing Museum of Nature History, Beijing, China.</nlm:affiliation>
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<author><name sortKey="Xu, Shenjian" sort="Xu, Shenjian" uniqKey="Xu S" first="Shenjian" last="Xu">Shenjian Xu</name>
<affiliation><nlm:affiliation>Lab of Systematic Evolution and Biogeography of Woody Plants, College of Nature Conservation, Beijing Forestry University, Beijing, China.</nlm:affiliation>
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<author><name sortKey="Wu, Jiayue" sort="Wu, Jiayue" uniqKey="Wu J" first="Jiayue" last="Wu">Jiayue Wu</name>
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<term>Salix (growth & development)</term>
<term>Salix (ultrastructure)</term>
<term>Seeds (anatomy & histology)</term>
<term>Seeds (growth & development)</term>
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<front><div type="abstract" xml:lang="en">The seeds of Salix and Populus (Salicaceae) are characterized by having numerous long hairs which loosely accompanying the seeds and a small annular appendage which surrounding the base of the seed along with tufted hairs. In this study, the complete development and detailed structure of the hairs and annular appendage in Salix matsudana were investigated using standard techniques for plant anatomy and histochemistry. The results show that the hairs originate successively from the single epidermal cells of the placenta (in megaspore mother cell phase) and funiculus (in eight-nucleate phase), and that their development consists of a progressive increase in cell size and an absence of cell division. The annular appendage is initiated from four to five rows of cells at the distal end of the funiculus in octant proembryo phase and its development is characterized by reactivated meristematic activity and a size increase of these cells. The initiation and development of the hairs are irrelevant to ovule development but fertilization and a developed embryo is necessary for the annular appendage to occur. Considering the reliable fossils, we inferred that the feature of seeds surrounded by long hairs is an ancestral character, and that the detachment of hairs from the funiculus and the occurrence of an annular appendage with tufts of hairs may be the more derived states for seed dispersal in Salix and Populus.</div>
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<ArticleTitle>Development, structure and evolutionary significance of seed appendages in Salix matsudana (Salicaceae).</ArticleTitle>
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<Abstract><AbstractText>The seeds of Salix and Populus (Salicaceae) are characterized by having numerous long hairs which loosely accompanying the seeds and a small annular appendage which surrounding the base of the seed along with tufted hairs. In this study, the complete development and detailed structure of the hairs and annular appendage in Salix matsudana were investigated using standard techniques for plant anatomy and histochemistry. The results show that the hairs originate successively from the single epidermal cells of the placenta (in megaspore mother cell phase) and funiculus (in eight-nucleate phase), and that their development consists of a progressive increase in cell size and an absence of cell division. The annular appendage is initiated from four to five rows of cells at the distal end of the funiculus in octant proembryo phase and its development is characterized by reactivated meristematic activity and a size increase of these cells. The initiation and development of the hairs are irrelevant to ovule development but fertilization and a developed embryo is necessary for the annular appendage to occur. Considering the reliable fossils, we inferred that the feature of seeds surrounded by long hairs is an ancestral character, and that the detachment of hairs from the funiculus and the occurrence of an annular appendage with tufts of hairs may be the more derived states for seed dispersal in Salix and Populus.</AbstractText>
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<AffiliationInfo><Affiliation>Lab of Systematic Evolution and Biogeography of Woody Plants, College of Nature Conservation, Beijing Forestry University, Beijing, China.</Affiliation>
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Development, structure and evolutionary significance of seed appendages in Salix matsudana (Salicaceae).

Development, structure and evolutionary significance of seed appendages in Salix matsudana (Salicaceae).

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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