Variation in wild pea (
Dormancy
Germination
Legumes
Niche-modelling
Pea
Proanthocyanidins
Seed coat
Temperature oscillations
Testa
Journal
PeerJ
ISSN: 2167-8359
Titre abrégé: PeerJ
Pays: United States
ID NLM: 101603425
Informations de publication
Date de publication:
2019
2019
Historique:
received:
14
11
2018
accepted:
11
12
2018
entrez:
19
1
2019
pubmed:
19
1
2019
medline:
19
1
2019
Statut:
epublish
Résumé
Seed germination is one of the earliest key events in the plant life cycle. The timing of transition from seed to seedling is an important developmental stage determining the survival of individuals that influences the status of populations and species. Because of wide geographical distribution and occurrence in diverse habitats, wild pea ( Seeds of 97 pea accessions were subjected to two germination treatments (oscillating temperatures of 25/15 °C and 35/15 °C) over 28 days. Germination pattern was described using B-spline coefficients that aggregate both final germination and germination speed. Relationships between germination pattern and environmental conditions at the site of origin (soil and bioclimatic variables extracted from WorldClim 2.0 and SoilGrids databases) were studied using principal component analysis, redundancy analysis and ecological niche modelling. Seeds were analyzed for the seed coat thickness, seed morphology, weight and content of proanthocyanidins (PA). Seed total germination ranged from 0% to 100%. Cluster analysis of germination patterns of seeds under two temperature treatments differentiated the accessions into three groups: (1) non-dormant (28 accessions, mean germination of 92%), (2) dormant at both treatments (29 acc., 15%) and (3) responsive to increasing temperature range (41 acc., with germination change from 15 to 80%). Seed coat thickness differed between groups with dormant and responsive accessions having thicker testa (median 138 and 140 µm) than non-dormant ones (median 84 mm). The total PA content showed to be higher in the seed coat of dormant (mean 2.18 mg g
Sections du résumé
BACKGROUND
BACKGROUND
Seed germination is one of the earliest key events in the plant life cycle. The timing of transition from seed to seedling is an important developmental stage determining the survival of individuals that influences the status of populations and species. Because of wide geographical distribution and occurrence in diverse habitats, wild pea (
METHODS
METHODS
Seeds of 97 pea accessions were subjected to two germination treatments (oscillating temperatures of 25/15 °C and 35/15 °C) over 28 days. Germination pattern was described using B-spline coefficients that aggregate both final germination and germination speed. Relationships between germination pattern and environmental conditions at the site of origin (soil and bioclimatic variables extracted from WorldClim 2.0 and SoilGrids databases) were studied using principal component analysis, redundancy analysis and ecological niche modelling. Seeds were analyzed for the seed coat thickness, seed morphology, weight and content of proanthocyanidins (PA).
RESULTS
RESULTS
Seed total germination ranged from 0% to 100%. Cluster analysis of germination patterns of seeds under two temperature treatments differentiated the accessions into three groups: (1) non-dormant (28 accessions, mean germination of 92%), (2) dormant at both treatments (29 acc., 15%) and (3) responsive to increasing temperature range (41 acc., with germination change from 15 to 80%). Seed coat thickness differed between groups with dormant and responsive accessions having thicker testa (median 138 and 140 µm) than non-dormant ones (median 84 mm). The total PA content showed to be higher in the seed coat of dormant (mean 2.18 mg g
Identifiants
pubmed: 30656074
doi: 10.7717/peerj.6263
pii: 6263
pmc: PMC6336014
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e6263Déclaration de conflit d'intérêts
The authors declare there are no competing interests.
Références
New Phytol. 2000 Dec;148(3):445-457
pubmed: 33863025
Ann Bot. 2019 May 20;123(5):815-829
pubmed: 30534972
Planta. 2014 Nov;240(5):955-70
pubmed: 24903359
Plant Physiol. 1974 Dec;54(6):817-20
pubmed: 16658981
Nat Commun. 2017 Nov 30;8(1):1868
pubmed: 29192192
New Phytol. 2017 Jun;214(4):1527-1536
pubmed: 28262955
Ecology. 2007 May;88(5):1086-90
pubmed: 17536393
Int J Mol Sci. 2017 Oct 21;18(10):
pubmed: 29065445
New Phytol. 2016 Feb;209(3):1301-12
pubmed: 26452074
Am Nat. 2000 Feb;155(2):168-186
pubmed: 10686159
Ann Bot. 2012 Nov;110(6):1205-19
pubmed: 22952378
Front Plant Sci. 2018 Jul 10;9:967
pubmed: 30042773
Biol Rev Camb Philos Soc. 2015 Feb;90(1):31-59
pubmed: 24618017
Ecology. 2006 Oct;87(10):2614-25
pubmed: 17089669
Plant Cell Environ. 2016 Aug;39(8):1737-48
pubmed: 26991665
J Agric Food Chem. 2010 Oct 27;58(20):10972-8
pubmed: 20879792
Genetics. 2014 Apr;196(4):1263-75
pubmed: 24443444
Biometrics. 1989 Mar;45(1):123-34
pubmed: 2720048
PLoS One. 2018 Mar 26;13(3):e0194056
pubmed: 29579076
PLoS One. 2017 Jul 11;12(7):e0181102
pubmed: 28700755
Annu Rev Plant Biol. 2006;57:405-30
pubmed: 16669768
Integr Comp Biol. 2017 Nov 1;57(5):1021-1039
pubmed: 28992196
Ecol Lett. 2015 Jan;18(1):1-16
pubmed: 25270536
Nat Commun. 2018 Feb 13;9(1):649
pubmed: 29440741
Front Plant Sci. 2014 Jul 17;5:351
pubmed: 25101104
New Phytol. 2014 Jul;203(1):300-9
pubmed: 24684268
PLoS One. 2017 Feb 16;12(2):e0169748
pubmed: 28207752
Front Plant Sci. 2017 Apr 13;8:548
pubmed: 28450875
Plant Physiol. 1973 May;51(5):914-6
pubmed: 16658439
Evolution. 2008 Nov;62(11):2868-83
pubmed: 18752605
Trends Ecol Evol. 1989 Feb;4(2):41-4
pubmed: 21227310
Genes (Basel). 2018 Nov 06;9(11):
pubmed: 30404223
Proc Natl Acad Sci U S A. 2008 Sep 16;105(37):14210-5
pubmed: 18772380
Proc Natl Acad Sci U S A. 2014 Dec 30;111(52):18787-92
pubmed: 25516986
Ann Bot. 2013 May;111(5):849-58
pubmed: 23456728
J Exp Bot. 2011 Jun;62(10):3289-309
pubmed: 21430292
Am J Bot. 2002 Oct;89(10):1644-50
pubmed: 21665592
Front Plant Sci. 2017 Apr 25;8:542
pubmed: 28487704
J Exp Bot. 2017 Feb 1;68(4):819-825
pubmed: 27940467
Evolution. 2018 Jun 27;:
pubmed: 29947421
Trends Plant Sci. 2007 Jan;12(1):29-36
pubmed: 17161643
Sci Rep. 2017 Dec 12;7(1):17384
pubmed: 29234080
Ecol Lett. 2016 Aug;19(8):992-1006
pubmed: 27250865
Plant Cell Environ. 2018 Aug;41(8):1806-1820
pubmed: 29520809
Elife. 2015 Mar 31;4:
pubmed: 25824056
Ann Bot. 2009 Feb;103(3):433-45
pubmed: 19098068
Plant Physiol. 2012 Dec;160(4):1871-80
pubmed: 23054566
PeerJ. 2018 Apr 26;6:e4690
pubmed: 29713566
PLoS One. 2017 Dec 27;12(12):e0190242
pubmed: 29281703
New Phytol. 2013 Jan;197(2):655-667
pubmed: 23171296