Phenotypic Effects of Salt and Heat Stress over Three Generations in Arabidopsis thaliana

摘要: Current and predicted environmental change will force many organisms to adapt novel conditions, especially sessile such as plants. It is therefore important better understand how plants react stress what extent genotypes differ in responses. has been proposed that adaptation conditions could be facilitated by heritable epigenetic changes induced stress, independent of genetic variation. Here we assessed phenotypic effects heat salt within across three generations using four highly inbred Arabidopsis thaliana (Col, Cvi, Ler Sha). Salt generally decreased fitness, but were differently affected, suggesting susceptibility A. varies among genotypes. Heat at an early rosette stage had less detrimental accelerated flowering out accessions. Additionally, found different modes transgenerational on phenotypes, all harboring the potential being adaptive: previous faster growth Sha, both under control resembling a tracking response, while variance several traits increased, diversified bet-hedging. experienced earlier altered plant architecture Sha not similar plasticity. However, depended type well genotype, may general response leading thaliana.