Variable desiccation tolerance in Acer pseudoplatanus seeds in relation to developmental conditions:: a case of phenotypic recalcitrance?

被引:65
作者
Daws, MI
Cleland, H
Chmielarz, P
Gorian, F
Leprince, O
Mullins, CE
Thanos, CA
Vandvik, V
Pritchard, HW
机构
[1] Royal Bot Gardens Kew, Seed Conservat Dept, Ardingly RH17 6TN, W Sussex, England
[2] Polish Acad Sci, Inst Dendrol, PL-62035 Kornik, Poland
[3] Natl Ctr Study & Conservat Forest Biodivers, State Forestry Serv, I-37020 Verona, Italy
[4] Univ Angers, INRA, INH, UMR Mol Seed Physiol, F-49045 Angers, France
[5] Univ Aberdeen, Dept Plant & Soil Sci, Aberdeen AB24 3UU, Scotland
[6] Univ Athens, Dept Bot, Athens 15784, Greece
[7] Univ Bergen, Dept Bot, N-5007 Bergen, Norway
关键词
climate change; heat sum; principal component analysis; recalcitrant seed;
D O I
10.1071/FP04206
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Nine seedlots of the widely planted southern and central European native tree species Acer pseudoplatanus L. were collected along a north - south gradient spanning 21 degrees of latitude in Europe. We investigated how the heat sum during seed development influences seed maturity as assessed by physical, physiological and biochemical traits. Using principal component analysis we found predictable and consistent patterns in all traits, which correlated with heat sum. For example, compared with fruits from their native range ( Italy and France, heat sum > 3000 degrees C d), fruits from the coldest location ( Scotland; heat sum of 1873 degrees C d) were shorter (c. 30 v. 42 mm), germinated over a narrower temperature range ( 5 - 20 v. 5 - 35 degrees C) and had smaller embryos ( 28 v. > 70 mg) with a higher water content ( c. 63 v. 48%), less negative solute potentials ( c. - 2.4 v. - 4.1 MPa) and were more desiccation sensitive ( critical water potential of - 20.2 v. - 55.4 to - 60.7 MPa). The observed level of desiccation-tolerance for the French and Italian seedlots is more consistent with the intermediate category than the previous classification of A. pseudoplatanus as recalcitrant. Our results demonstrate that a lower heat sum causes fruits from northern Europe to be dispersed before maximum potential seed quality is achieved.
引用
收藏
页码:59 / 66
页数:8
相关论文
共 44 条
[31]  
Pritchard HW, 1996, SEED SCI RES, V6, P127
[32]   A multifactorial study of conditions influencing longevity of neem (Azadirachta indica) seeds [J].
Sacandé, M ;
Hoekstra, FA ;
van Pijlen, JG ;
Groot, SPC .
SEED SCIENCE RESEARCH, 1998, 8 (04) :473-482
[33]   Photosynthetic and antioxidant enzyme responses of sugar maple and red maple seedlings to excess manganese in contrasting light environments [J].
St Clair, SB ;
Lynch, JP .
FUNCTIONAL PLANT BIOLOGY, 2004, 31 (10) :1005-1014
[34]  
Sun WQ, 2001, SEED SCI RES, V11, P317
[35]  
SUSZKA B, 1980, Arboretum Kornickie, V25, P199
[36]  
THOMPSON PA, 1975, ANN BOT-LONDON, V39, P1
[37]   WATER STATUS CHANGES DURING DEVELOPMENT IN RELATION TO THE GERMINATION AND DESICCATION TOLERANCE OF AESCULUS-HIPPOCASTANUM L SEEDS [J].
TOMPSETT, PB ;
PRITCHARD, HW .
ANNALS OF BOTANY, 1993, 71 (02) :107-116
[38]   The effect of chilling and moisture status on the germination, desiccation tolerance and longevity of Aesculus hippocastanum L. seed [J].
Tompsett, PB ;
Pritchard, HW .
ANNALS OF BOTANY, 1998, 82 (02) :249-261
[39]  
Underwood A.J., 1997, EXPT ECOLOGY
[40]  
WARR SJ, 1986, THESIS U LANCASTER U