{"title":"在lophantha亚种中,广泛的晶状体形态与打破物理休眠有关。lophantha","authors":"Geoff Burrows","doi":"10.1017/s0960258525100020","DOIUrl":null,"url":null,"abstract":"<p>The classification of acacias has gone through recent upheaval. The latest phylogenies indicate that <span>Acacia sensu stricto</span> is only relatively distantly related to the species with which it was once grouped. Its sister group is the monospecific <span>Paraserianthes</span>. This study concerns <span>P. lophantha</span> subsp. <span>lophantha</span>, a species from SW Western Australia that is widely invasive. Both genera have seeds with physical dormancy (PY) and a lens-type water gap. Seed structure, particularly that of the lens, was assessed in <span>Paraserianthes</span> and compared with <span>Acacia</span>. Seed batch viability was almost 100%, all seeds had PY and average seed mass was 73 mg. The seed coat and the embryo made almost equal contributions to seed mass, indicating a substantial seed coat. Average testa (410 µm) and palisade layer (163 µm) thicknesses were greater than in most investigated <span>Acacia</span> species. Unpopped lenses were small (0.11 mm<span>2</span>, about 0.15% of the seed surface area). With a 1 min boiling water treatment, the lens detached from the seeds. The palisade cells of the lens were about 100% larger in area after detaching, which indicates that they previously were under considerable tension. With other PY-breaking treatments, the lens formed a mound or a slight change in colour occurred. The seeds of <span>Paraserianthes lophantha</span> had the same basic construction as most <span>Acacia</span> seeds, although they were relatively large and heavy, the testa made up a large proportion of the seed and the palisade cells were long. Different lens morphologies, associated with different dormancy-breaking treatments, have rarely been described.</p>","PeriodicalId":21711,"journal":{"name":"Seed Science Research","volume":"3 1","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A wide range of lens morphologies is associated with breaking physical dormancy in Paraserianthes lophantha subsp. lophantha\",\"authors\":\"Geoff Burrows\",\"doi\":\"10.1017/s0960258525100020\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The classification of acacias has gone through recent upheaval. The latest phylogenies indicate that <span>Acacia sensu stricto</span> is only relatively distantly related to the species with which it was once grouped. Its sister group is the monospecific <span>Paraserianthes</span>. This study concerns <span>P. lophantha</span> subsp. <span>lophantha</span>, a species from SW Western Australia that is widely invasive. Both genera have seeds with physical dormancy (PY) and a lens-type water gap. Seed structure, particularly that of the lens, was assessed in <span>Paraserianthes</span> and compared with <span>Acacia</span>. Seed batch viability was almost 100%, all seeds had PY and average seed mass was 73 mg. The seed coat and the embryo made almost equal contributions to seed mass, indicating a substantial seed coat. Average testa (410 µm) and palisade layer (163 µm) thicknesses were greater than in most investigated <span>Acacia</span> species. Unpopped lenses were small (0.11 mm<span>2</span>, about 0.15% of the seed surface area). With a 1 min boiling water treatment, the lens detached from the seeds. The palisade cells of the lens were about 100% larger in area after detaching, which indicates that they previously were under considerable tension. With other PY-breaking treatments, the lens formed a mound or a slight change in colour occurred. The seeds of <span>Paraserianthes lophantha</span> had the same basic construction as most <span>Acacia</span> seeds, although they were relatively large and heavy, the testa made up a large proportion of the seed and the palisade cells were long. Different lens morphologies, associated with different dormancy-breaking treatments, have rarely been described.</p>\",\"PeriodicalId\":21711,\"journal\":{\"name\":\"Seed Science Research\",\"volume\":\"3 1\",\"pages\":\"\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2025-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Seed Science Research\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1017/s0960258525100020\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Seed Science Research","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1017/s0960258525100020","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
A wide range of lens morphologies is associated with breaking physical dormancy in Paraserianthes lophantha subsp. lophantha
The classification of acacias has gone through recent upheaval. The latest phylogenies indicate that Acacia sensu stricto is only relatively distantly related to the species with which it was once grouped. Its sister group is the monospecific Paraserianthes. This study concerns P. lophantha subsp. lophantha, a species from SW Western Australia that is widely invasive. Both genera have seeds with physical dormancy (PY) and a lens-type water gap. Seed structure, particularly that of the lens, was assessed in Paraserianthes and compared with Acacia. Seed batch viability was almost 100%, all seeds had PY and average seed mass was 73 mg. The seed coat and the embryo made almost equal contributions to seed mass, indicating a substantial seed coat. Average testa (410 µm) and palisade layer (163 µm) thicknesses were greater than in most investigated Acacia species. Unpopped lenses were small (0.11 mm2, about 0.15% of the seed surface area). With a 1 min boiling water treatment, the lens detached from the seeds. The palisade cells of the lens were about 100% larger in area after detaching, which indicates that they previously were under considerable tension. With other PY-breaking treatments, the lens formed a mound or a slight change in colour occurred. The seeds of Paraserianthes lophantha had the same basic construction as most Acacia seeds, although they were relatively large and heavy, the testa made up a large proportion of the seed and the palisade cells were long. Different lens morphologies, associated with different dormancy-breaking treatments, have rarely been described.
期刊介绍:
Seed Science Research, the official journal of the International Society for Seed Science, is a leading international journal featuring high-quality original papers and review articles on the fundamental aspects of seed science, reviewed by internationally distinguished editors. The emphasis is on the physiology, biochemistry, molecular biology and ecology of seeds.