Isolation and characterization of high temperature-resistant germination mutants of Arabidopsis thaliana - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Plant and Cell Physiology Année : 2006

Isolation and characterization of high temperature-resistant germination mutants of Arabidopsis thaliana

Noriko Tamura
  • Fonction : Auteur
Arata Tanaka
  • Fonction : Auteur
Ryuta Sasaki
  • Fonction : Auteur
Asuka Bando
  • Fonction : Auteur
Shigeo Toh
Loic L. Lepiniec

Résumé

Temperature is a primary environmental cue for seed germination of many weeds and vegetables. To investigate the mechanism of germination regulation by temperature, we selected five high temperature (thermoinhibition)-resistant germination mutants (TRW lines) from 20,000 T-DNA insertion lines of Arabidopsis. Segregation analyses indicated that each of the five lines had single locus recessive mutations. The seeds of TRW134-15 and TRW187 showed reduced sensitivity to ABA and also to the gibberrellin biosynthesis inhibitor, paclobutrazol. Genetic and nucleotide sequencing analyses indicated that TRW187 is a new allele of abi3 (abi3-14). TRW71-1 exhibited a maternal effect for both thermoinhibition-resistant and transparent testa phenotypes, and genetic analysis revealed that the mutation was allelic to tt7 (tt7-4 sib). Interestingly, the seeds of reduced dormancy mutants rdo1, rdo2, rdo3 and rdo4 were also thermoinhibition tolerant, and all the TRW seeds showed reduced dormancy. Like rdo3, TRW13-1 had shorter siliques and slightly shorter stems than the wild type. The mutation of TRW13-1 was mapped to the bottom arm of chromosome 1 where rdo3 has also been mapped, but the two mutants are not allelic. We designated TRW13-1 as thermoinhibition-resistant germination 1 (trg1). We also mapped the ABA-insensitive mutation of TRW134-15 to the bottom arm of chromosome 5 and named it trg2. These results show that both embryo/endosperm and maternal factors contribute to germination inhibition at supraoptimal temperatures in Arabidopsis. In addition, we confirm the role of ABA in thermoinhibition of seed germination and a link between seed physiological dormancy and response to high temperature.
Fichier non déposé

Dates et versions

hal-02660259 , version 1 (30-05-2020)

Identifiants

  • HAL Id : hal-02660259 , version 1
  • PRODINRA : 16374
  • WOS : 000240328700006

Citer

Noriko Tamura, Takahiro Yoshida, Arata Tanaka, Ryuta Sasaki, Asuka Bando, et al.. Isolation and characterization of high temperature-resistant germination mutants of Arabidopsis thaliana. Plant and Cell Physiology, 2006, 47 (8), pp.1081-1094. ⟨hal-02660259⟩
8 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More