Seed Science Research 15: 281-307 (2005)

Plant hormone interactions during seed dormancy release and germination

Birgit Kucera, Marc Alan Cohn, Gerhard Leubner-Metzger

Institut für Biologie II (Botanik/Pflanzenphysiologie), Albert-Ludwigs-Universität Freiburg, Schänzlestr. 1, D-79104 Freiburg i. Br., Germany, Web: 'The Seed Biology Place' http://www.seedbiology.de (B.K., G.L.-M.)
Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, 302 Life Sciences Building, Baton Rouge, Louisiana 70803, U.S.A. (M.A.C.)

Received 27 May 2005; accepted after revision 27 August 2005

Table 1. Selected plant hormone mutants and their seed phenotypes. Hormone mutants of Arabidopsis thaliana, Lycopersicon esculentum, Nicotiana tabacum, Nicotiana plumbaginifolia and Zea mays are grouped in defined classes for abscisic acid (ABA), gibberellin (GA), ethylene (C2H4) and brassinosteroids (BR)
Hormone  Mutant classa  Species  Gene/locusb  Protein functionc  Mutantd or transgenic line  Dominancee  Mutant seed dormancy  Select. other mutant seed effects  References f 
ABA  Deficiency  A. thaliana  ABA1  ABA biosynthesis  aba1-1  Reduced  Vivipary  13, 24, 26, 27 
    L. esculentum  NOT  ABA biosynthesis  not  Reduced  Vivipary  13, 19, 54 
     L. esculentum  SITW  ABA biosynthesis  sitW  Reduced  Vivipary   13, 19, 54 
    Z. mays  VP14  Carotinoid cleavage, ABA biosynthesis  vp14  Reduced  Vivipary  31, 55 
    N. tabacum    Anti-ABA antibody      Reduced    42 
    N. plumbaginifolia  ABA2  ABA biosynthesis  aba2  Reduced  Vivipary  14, 15, 34 
     N. plumbaginifolia   ABA biosynthesis  antisense-ABA2  Reduced   Vivipary  14, 15, 34  
  Overproduction  A. thaliana  CYP707A  ABA degradation  cyp707a2  Enhanced    27 
    N. plumbaginifolia  ABA2  ABA biosynthesis  sense-ABA2  Enhanced    14 
  Insensitivity  A. thaliana  ABI1  Ser/Thr protein phosphatases 2C
(PP2C) 
abi1-1  SD  Reduced  Reduced ABA sensitivity of germination  2, 26, 30, 33, 38, 51 
    A. thaliana   ABI2  PP2C  abi2-1  SD  Reduced  Reduced ABA sensitivity of germination   2, 26, 30, 33, 38, 51  
    A. thaliana  ABI3  VP1/ABI3-type
B3-domain TF 
abi3  Severely reduced  Reduced ABA sensitivity of germination; reduced seed longevity  1, 21, 30, 33, 36, 38, 43, 45 
    A. thaliana  ABI4  AP2/EREBP TF  abi4  Normal  Reduced ABA sensitivity of germination  3, 12, 39, 48 
    A. thaliana  ABI5  bZIP TF  abi5  Normal  Reduced ABA sensitivity of germination  3, 11, 12, 32, 33 
    A. thaliana  ABI8  abi8  Reduced ABA sensitivity of germination 
    A. thaliana  RPK1  Leucine-rich repeat receptor-like kinase  rpk1  Reduced (?)  Reduced ABA sensitivity of germination  39a 
    Z. mays  VP1  VP1/ABI3-type
B3-domain TF 
vp1  Reduced  Vivipary  1, 21, 35, 47 
  Hypersensitivity or constitutive response  A. thaliana  ERA1  Farnesyl transferase  era1  Enhanced    2, 8, 16, 46 
     A. thaliana  ERA3  EIN2 allele  era3  Enhanced     2, 8, 16, 46 
    A. thaliana  SAD1  Sm-like snRNP protein  sad1  Enhanced  ABA hyper-sensitive germination  56 
    A. thaliana  ABH1  mRNA cap-binding protein  abh1  ABA hyper-sensitive germination  22 
GA  Deficiency  A. thaliana  GA1  GA biosynthesis  ga1  Enhanced    9, 25, 26, 41, 44, 51 
    L. esculentum  GIB-1  GA biosynthesis  gib-1  Enhanced    20, 25, 26, 44 
  Insensitivity  A. thaliana  GAI  DELLA-type
GRAS TF 
gai
gain-of function
SD  Enhanced    10, 26, 41, 44 
    A. thaliana  SLY1  F-box protein  sly1  Enhanced    41, 50, 51, 57 
  Hypersensitivity or constitutive response  A. thaliana  GAI  DELLA-type
GRAS TF 
gai-t6
loss-of function 
Reduced    6, 10, 26, 41, 44 
      RGL2  DELLA-type
GRAS TF 
rgl2
loss-of function 
Reduced     6, 10, 26, 41, 44
    A. thaliana  SPY  O-GlcNAc transferase  spy  Reduced    18, 23, 41, 52, 54, 57 
C2H4  Insensitivity  A. thaliana  ETR1  Ethylene receptor  etr1-1  Enhanced  ABA hyper-sensitive germination  2, 4, 16, 17, 29, 40 
     A. thaliana  EIN2  Metal transporter?  ein2  Enhanced  ABA hyper-sensitive germination  2, 17 
    A. thaliana   EIN3  TF  ein3    49 
  Hypersensitivity or constitutive response  A. thaliana  CTR1  Raf-like protein kinase (MAPKKK)  ctr1  Slightly reduced  Slightly reduced ABA sensitivity of germination  2, 7, 17, 40 
BR  Deficiency  A. thaliana  DET2  BR biosynthesis  det2-1    ABA hyper-sensitive germination  50 
  Insensitivity  A. thaliana  BRI1  BR receptor  bri1-1    ABA hyper-sensitive germination  28, 50, 53 
a Four mutant classes either altered in hormone biosynthesis (hormone-deficient mutants, hormone-overproducing mutants) or in hormone response/signal transduction (hormone-insensitive mutants, constitutive response/hormone-hypersensitive mutants). 
b Mutant abbreviations: aba1, aba2=ABA-deficient1, 2; abh1=ABA-hypersensitive1; abi1 to abi8=ABA-insensitive1 to ABA-insensitive8; bri1=Brassinosteriod-insensitive1; ctr1=constitutive triple response1; det2-1=de-etiolated2; ein2, ein3=ethylene insensitive2, 3; era1, era3=enhanced response to ABA1, ABA3; etr1=ethylene resistant1; ga1=GA-deficient1; gai=GA-insensitive; gib-1=GA-deficient-1; not=notabilis; sitW=sitiensW; sly1=sleepy1; spy=spindly; rga=repressor-of-ga1-3; rgl2=rga-like2; rpk1=receptor-like protein kinase1; sad1=supersensitive to ABA and drought; spy=spindly; vp1=viviparous1 
c TF=transcription factor. 
d In some cases several alleles, in some cases specific alleles, are given. 
e Dominance over wild-type locus: D=dominant, SD=semi-dominant, R=recessive. 
f Selected references: 1, Baumbusch et al. (2004); 2, Beaudoin et al. (2000); 3, Bensmihen et al. (2005); 4, Bleecker et al. (1988); 5, Brocard-Gifford et al. (2004); 6, Cao et al. (2005); 7, Chang (2003); 8, Cutler et al. (1996); 9, Debeaujon and Koornneef (2000); 10, Derkx and Karssen (1993); 11, Finkelstein and Lynch (2000); 12, Finkelstein et al. (2002); 13, Finkelstein et al. (1998); 14, Frey et al. (1999); 15, Frey et al. (2004); 16, Ghassemian et al. (2000); 17, Hall et al. (2001); 18, Hartweck et al. (2002); 19, Hilhorst (1995); 20, Hilhorst and Karssen, 1992; 21, Holdsworth et al. (2001); 22, Hugouvieux et al. (2002); 23, Izhaki et al. (2001); 24, Karssen et al. (1983); 25, Karssen et al. (1989); 26, Koornneef and Karssen (1994); 27, Kushiro et al. (2004); 28, Leubner-Metzger (2001); 29, Leubner-Metzger et al. (1998); 30, Leung and Giraudat (1998); 31, Liotenberg et al. (1999); 32, Lopez-Molina et al. (2001); 33, Lopez-Molina et al. (2003); 34, Marin et al. (1996); 35, McCarty (1995); 36, Nambara et al. (1992); 37, Nambara et al. (1998); 38, Nambara et al. (2002); 39, Ohta et al. (2000); 39a, Osakabe et al. (2005); 40, Ouaked et al. (2003); 41, Peng and Harberd (2002); 42, Phillips et al. (1997); 43, Raz et al. (2001); 44, Richards et al. (2001); 45, Rohde et al. (2000); 46, Ross and O'Neill (2001); 47, Schwechheimer and Bevan (1998); 48, Söderman et al. (2000); 49, Solano et al. (1998); 50, Steber and McCourt (2001); 51, Steber et al. (1998); 52, Swain et al. (2001); 53, Szekeres (2003); 54, Thompson et al. (2000); 55, White et al. (2000); White and Rivin (2000); 56, Xiong et al. (2001); 57, Yamaguchi and Kamiya (2002). 

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Abstract Figure 1 Figure 2 Table 1
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