Effects of different magnesium nutrition levels on chlorophyll fluorescence characteristics and excitation energy dissipation in rice leaves Differences of Anatomic Structure in Citrus Leaves Caused by Boron and Magnesium Deficiency Differences of Anatomic Structure in Citrus Leaves Caused by Boron and Magnesium Deficiency EFFECTS OF MAGNESIUM DEFICIENCY ON THE YIELD AND DISTRIBUTION OF PHOTOSYNTHATE OF LONGAN ( Dimocarpus longana LOUR) Construction of a Cucumber cDNA Microarray and Its Application in the Study of Response of Cucumber Plants to Magnesium Deficiency Stress Construction of a Cucumber cDNA Microarray and Its Application in the Study of Response of Cucumber Plants to Magnesium Deficiency Stress Effects of sodium nitroprusside on alleviating magnesium deficiency of cucumber seedlings under NO-3 stress Effect of magnesium deficiency on nitrogen metabolism of longan (Dimocarpus longana Lour) seedlings Effects of magnesium deficiency on senescence of Dimocarpus longana leaves