Seed dormancy and dormancy-breaking methods in Leymus chinensis (Trin.) Tzvel. (Poaceae)

X. Q. He; Y. R. Wang; X. W. Hu; C. C. Baskin; J. M. Baskin; Y. Y. Lv

doi:10.1111/gfs.12220

Seed dormancy and dormancy-breaking methods in Leymus chinensis (Trin.) Tzvel. (Poaceae)

X. Q. He, Y. R. Wang, X. W. Hu, C. C. Baskin, J. M. Baskin, Y. Y. Lv

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Leymus chinensis (Trin.) Tzvel. is a perennial grass with high productivity and forage value; however, poor stand establishment, often due to seed dormancy, limits its widespread use for forage production. To investigate the mechanism of seed dormancy and to develop effective methods of improving germination, the contribution of each part of the caryopsis to dormancy was investigated, and a number of single or combined dormancy-breaking pre-treatments were conducted using three seed lots. The palea, lemma, pericarp/testa, and endosperm all contributed to seed dormancy. The contribution of each part to dormancy was 23·4%, lemma; 6·2%, palea; 28·4%, pericarp/testa; and 42·0%, endosperm. Hull (palea and lemma) removal, pericarp/testa piercing, and soaking in distilled water or 30% sodium hydroxide (NaOH) significantly decreased the percentage of dormant seeds (i.e. increased germination). Treating hull-removed and pericarp/testa-pierced seeds with gibberellic acid (GA₃) also significantly decreased the percentage of dormant seeds. Compared with each of the single pre-treatments, the combined pre-treatment of pre-soaking in water for 1 d, then 30% NaOH for 60 min and treating with 300 μm GA₃ resulted in the highest germination (89%); and seed viability was 91%.

Original language	English
Pages (from-to)	641-648
Number of pages	8
Journal	Grass and Forage Science
Volume	71
Issue number	4
DOIs	https://doi.org/10.1111/gfs.12220
State	Published - Dec 1 2016

Bibliographical note

Funding Information:
We would like to thank the National Basic Research Program (973 program) of China (2014CB138704), (2007CB108904), the National Natural Science Foundation of China (30771532), and the Fundamental Research Funds for the Central Universities (Z109021205) for supporting this research. We also thank Margaret Cargill for helpful revision of an early draft of the manuscript.

Publisher Copyright:
© 2016 John Wiley & Sons Ltd

Keywords

Leymus chinensis
dormancy-breaking methods
seed dormancy
seed germination
seed imbibition
seed viability

ASJC Scopus subject areas

Agronomy and Crop Science
Management, Monitoring, Policy and Law

Access to Document

10.1111/gfs.12220

Cite this

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title = "Seed dormancy and dormancy-breaking methods in Leymus chinensis (Trin.) Tzvel. (Poaceae)",

abstract = "Leymus chinensis (Trin.) Tzvel. is a perennial grass with high productivity and forage value; however, poor stand establishment, often due to seed dormancy, limits its widespread use for forage production. To investigate the mechanism of seed dormancy and to develop effective methods of improving germination, the contribution of each part of the caryopsis to dormancy was investigated, and a number of single or combined dormancy-breaking pre-treatments were conducted using three seed lots. The palea, lemma, pericarp/testa, and endosperm all contributed to seed dormancy. The contribution of each part to dormancy was 23·4%, lemma; 6·2%, palea; 28·4%, pericarp/testa; and 42·0%, endosperm. Hull (palea and lemma) removal, pericarp/testa piercing, and soaking in distilled water or 30% sodium hydroxide (NaOH) significantly decreased the percentage of dormant seeds (i.e. increased germination). Treating hull-removed and pericarp/testa-pierced seeds with gibberellic acid (GA3) also significantly decreased the percentage of dormant seeds. Compared with each of the single pre-treatments, the combined pre-treatment of pre-soaking in water for 1 d, then 30% NaOH for 60 min and treating with 300 μm GA3 resulted in the highest germination (89%); and seed viability was 91%.",

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AU - Lv, Y. Y.

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N2 - Leymus chinensis (Trin.) Tzvel. is a perennial grass with high productivity and forage value; however, poor stand establishment, often due to seed dormancy, limits its widespread use for forage production. To investigate the mechanism of seed dormancy and to develop effective methods of improving germination, the contribution of each part of the caryopsis to dormancy was investigated, and a number of single or combined dormancy-breaking pre-treatments were conducted using three seed lots. The palea, lemma, pericarp/testa, and endosperm all contributed to seed dormancy. The contribution of each part to dormancy was 23·4%, lemma; 6·2%, palea; 28·4%, pericarp/testa; and 42·0%, endosperm. Hull (palea and lemma) removal, pericarp/testa piercing, and soaking in distilled water or 30% sodium hydroxide (NaOH) significantly decreased the percentage of dormant seeds (i.e. increased germination). Treating hull-removed and pericarp/testa-pierced seeds with gibberellic acid (GA3) also significantly decreased the percentage of dormant seeds. Compared with each of the single pre-treatments, the combined pre-treatment of pre-soaking in water for 1 d, then 30% NaOH for 60 min and treating with 300 μm GA3 resulted in the highest germination (89%); and seed viability was 91%.

AB - Leymus chinensis (Trin.) Tzvel. is a perennial grass with high productivity and forage value; however, poor stand establishment, often due to seed dormancy, limits its widespread use for forage production. To investigate the mechanism of seed dormancy and to develop effective methods of improving germination, the contribution of each part of the caryopsis to dormancy was investigated, and a number of single or combined dormancy-breaking pre-treatments were conducted using three seed lots. The palea, lemma, pericarp/testa, and endosperm all contributed to seed dormancy. The contribution of each part to dormancy was 23·4%, lemma; 6·2%, palea; 28·4%, pericarp/testa; and 42·0%, endosperm. Hull (palea and lemma) removal, pericarp/testa piercing, and soaking in distilled water or 30% sodium hydroxide (NaOH) significantly decreased the percentage of dormant seeds (i.e. increased germination). Treating hull-removed and pericarp/testa-pierced seeds with gibberellic acid (GA3) also significantly decreased the percentage of dormant seeds. Compared with each of the single pre-treatments, the combined pre-treatment of pre-soaking in water for 1 d, then 30% NaOH for 60 min and treating with 300 μm GA3 resulted in the highest germination (89%); and seed viability was 91%.

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Seed dormancy and dormancy-breaking methods in Leymus chinensis (Trin.) Tzvel. (Poaceae)

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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