Nitrogen limitation and high density responses in rice suggest a role for ethylene under high density stress

BackgroundHigh density stress, also known as intraspecies competition, causes significant yield losses in a wide variety of crop plants. At the same time, increases in density tolerance through selective breeding and the concomitant ability to plant crops at a higher population density has been one of the most important factors in the development of high yielding modern cultivars.ResultsPhysiological changes underlying high density stress were …