GERMINATION RESPONSES TO LIGHT AND ALTERNATING TEMPERATURES IN EUROPEAN POPULATIONS OF DACTYLIS GLOMERATA L. III. THE ROLE OF THE OUTER COVERING STRUCTURES.
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| Title: | GERMINATION RESPONSES TO LIGHT AND ALTERNATING TEMPERATURES IN EUROPEAN POPULATIONS OF DACTYLIS GLOMERATA L. III. THE ROLE OF THE OUTER COVERING STRUCTURES. |
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| Authors: | Probert, R. J.1, Smith, R. D.1, Birch, P.2 |
| Source: | New Phytologist. Jul85, Vol. 100 Issue 3, p447-455. 9p. |
| Subjects: | Orchard grass, Plant physiology, Germination, Physiological effects of temperature, Light, Physiological effects of oxygen, Seeds |
| Abstract: | The influence of the outer covering structures (palea, lemma and pericarp) on the germination response to light and alternating temperatures was investigated in two populations of Dactylis glomerata L. Removal of the palea and lemma was less effective than light or alternating temperatures in promoting germination. Despite quantitative differences, both populations responded similarly to all three factors. Statistical analysis of data transformed to probits indicated mainly additive effects when factors were combined. Selective surgical treatments showed that the structural integrity of the pericarp was also important in germination control. Removal of the palea and lemma followed by the making of a shallow incision in the pericarp close to the embryo, stimulated germination in a very high proportion of individuals (94 %) even at a constant temperature (16 °C) in the dark. Elevated oxygen levels promoted germination of intact seeds suggesting that the outer coverings might restrict oxygen access. Evidence is presented that positive pressures (0.03 MPa) applied during gassing led to a reduction in germination. [ABSTRACT FROM AUTHOR] |
| Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 11918502 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: GERMINATION RESPONSES TO LIGHT AND ALTERNATING TEMPERATURES IN EUROPEAN POPULATIONS OF DACTYLIS GLOMERATA L. III. THE ROLE OF THE OUTER COVERING STRUCTURES. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Probert%2C+R%2E+J%2E%22">Probert, R. J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Smith%2C+R%2E+D%2E%22">Smith, R. D.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Birch%2C+P%2E%22">Birch, P.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22New+Phytologist%22">New Phytologist</searchLink>. Jul85, Vol. 100 Issue 3, p447-455. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Orchard+grass%22">Orchard grass</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+physiology%22">Plant physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Germination%22">Germination</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+effects+of+temperature%22">Physiological effects of temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Light%22">Light</searchLink><br /><searchLink fieldCode="DE" term="%22Physiological+effects+of+oxygen%22">Physiological effects of oxygen</searchLink><br /><searchLink fieldCode="DE" term="%22Seeds%22">Seeds</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The influence of the outer covering structures (palea, lemma and pericarp) on the germination response to light and alternating temperatures was investigated in two populations of Dactylis glomerata L. Removal of the palea and lemma was less effective than light or alternating temperatures in promoting germination. Despite quantitative differences, both populations responded similarly to all three factors. Statistical analysis of data transformed to probits indicated mainly additive effects when factors were combined. Selective surgical treatments showed that the structural integrity of the pericarp was also important in germination control. Removal of the palea and lemma followed by the making of a shallow incision in the pericarp close to the embryo, stimulated germination in a very high proportion of individuals (94 %) even at a constant temperature (16 °C) in the dark. Elevated oxygen levels promoted germination of intact seeds suggesting that the outer coverings might restrict oxygen access. Evidence is presented that positive pressures (0.03 MPa) applied during gassing led to a reduction in germination. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/j.1469-8137.1985.tb02793.x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 447 Subjects: – SubjectFull: Orchard grass Type: general – SubjectFull: Plant physiology Type: general – SubjectFull: Germination Type: general – SubjectFull: Physiological effects of temperature Type: general – SubjectFull: Light Type: general – SubjectFull: Physiological effects of oxygen Type: general – SubjectFull: Seeds Type: general Titles: – TitleFull: GERMINATION RESPONSES TO LIGHT AND ALTERNATING TEMPERATURES IN EUROPEAN POPULATIONS OF DACTYLIS GLOMERATA L. III. THE ROLE OF THE OUTER COVERING STRUCTURES. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Probert, R. J. – PersonEntity: Name: NameFull: Smith, R. D. – PersonEntity: Name: NameFull: Birch, P. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul85 Type: published Y: 1985 Identifiers: – Type: issn-print Value: 0028646X Numbering: – Type: volume Value: 100 – Type: issue Value: 3 Titles: – TitleFull: New Phytologist Type: main |
| ResultId | 1 |
