Abstract
High-temperature stress causes abortive male reproductive development in many plant species.
We have showed that high-temperature stress induces premature cessation of cell division on anther wall cells and pollen mother cells , premature degradation of tapetal cells and alters of particular genes expression . In the process, we noticed increased expression of polyamine oxidase (PAO) that is important enzyme to cause programed cell death on hypersensitive response in tobacco plants and notable alteration of expression on various phytohormone related genes.
To address the function of PAO and phytohormones during high-temperature male sterility, we dosed Inhibitor of PAO and phytohormones in barley plant under high-temperature condition. As a result, we found that the treatment of exogenous phytohormones conferred high-temperature tolerance on male reproductive organs in barley plants.
These results indicate the reduction of quantity and/or sensitivity to the phytohormone causes high-temperature male sterility in barley plant.
