Changes of Endogenous ABA Levels in Rice Embryo and Endosperm and Association with Development and Germination Effect of phosphorus-deficiency stress on abscisic acid contents in asparagus bean seedlings Researches on the stress resistant types of the plants during the grassland sandy desertification process Effects of silicon application on growth and transpiration rate of maize Expression Analysis of the PobZIP1 Transcription Factor Gene in Developmental Seeds from Tree Peony and Its Relationship with ABA Content Expression Analysis of the PobZIP1 Transcription Factor Gene in Developmental Seeds from Tree Peony and Its Relationship with ABA Content