Fumitaka Abe

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Seed dormancy is an adaptive mechanism and an important agronomic trait. Temperature during seed development strongly affects seed dormancy in wheat (Triticum aestivum) with lower temperatures producing higher levels of seed dormancy. To identify genes important for seed dormancy, we used a wheat microarray to analyze gene expression in embryos from mature(More)
To study similar, but distinct, plant disease resistance (R) specificities exhibited by allelic genes at the rice blast resistance locus Pik/Pikm, we cloned the Pik gene from rice cultivar Kanto51 and compared its molecular features with those of Pikm and of another Pik gene cloned from cv. Kusabue. Like Pikm, Pik is composed of two adjacent NBS-LRR(More)
To develop strategies for manipulating the level of crop seed dormancy, it is necessary to search for the genes that control dormancy. In this study, we investigated whether wheat and barley homologues of the Arabidopsis dormancy gene DOG1 (Delay of Germination 1), TaDOG1L1 and HvDOG1L1 (respectively), also induce seed dormancy. Because their sequence(More)
Exposing plants to hypoxic conditions greatly improves their anoxic stress tolerance by enhancing the activities of glycolysis and fermentation in roots. Ethylene may also be involved in these adaptive responses because its synthesis is increased in roots under hypoxic conditions. Here it is reported that pre-treatment of wheat seedlings with an ethylene(More)
The Arabidopsis gene DOG1 (AtDOG1) functions in seed dormancy and in sugar signaling. Little is known about the structural and functional features of plant genes homologous to AtDOG1, except for one type (clade 1) of Triticeae AtDOG1-like genes, which was previously demonstrated to be functionally orthologous to AtDOG1. Here, through phylogenetic,(More)
Seed dormancy is an important agronomic trait: low levels can cause premature germination, while too much can inhibit uniform germination. As an approach to controlling the seed dormancy level in crops, we used Triticeae DOG1-like genes as transgenes. DOG1 is an Arabidopsis gene that underlies natural variation in seed dormancy. We previously showed that(More)
This paper describes a method of generating low-distortion sinusoidal waves using an arbitrary waveform generator (AWG), and experimental results of using such a generator for ADC dynamic performance testing. With this proposed method, 3 order harmonics of the generated signal are suppressed simply by changing the AWG program (or waveform memory(More)
This paper describes the architecture (circuit design) and principles of operation of sigma-delta (ΣΔ) time-todigital converters (TDC) for high-speed I/O interface circuit test applications; they offer good accuracy with short test times. In particular, we describe multi-bit ΣΔ TDC architectures for fast testing. However, mismatches among delay cells in(More)