1. Abd-El Baki GK, Siefritz F, Man H-M, Weiner H, Kaldenhoff R, Kaiser WM (2000) Nitrate reductase in Zea mays L. under salinity. Plant Cell Environ 23:515–521
2. Abdel-Ghaffar AS, El-Attar HA, El-Halfawi MH, Abdel Salam AA (1981) Effects of inoculation, nitrogen fertilizer, salinity, and water stress on symbiotic N, fixation by Viciafoba and Phaseolus vulgaris. In: Graham PH, Harris SC (eds) Biological nitrogen fixation technology for tropical agriculture. CIAT, Cali
3. Acuna-Galindo MA, Mason RE, Subramanian NK, Hays DB (2015) Meta-analysis of wheat QTL regions associated with adaptation to drought and heat stress. Crop Sci 55:477–492
4. Aerts R, Chapin FS (2000) The mineral nutrition of wild plants revisited: a re-evaluation of processes and patterns. In: Fitter AH, Raffaelli DG (eds) Advances in ecological research, vol 30. Elsevier, San Diego, pp 1–67
5. Agboma PC, Peltonen-Sainio P, Hinkkanen R, Pehu E (1997) Effect of foliar application of glycine betaine on yield components of drought-stressed tobacco plants. Exp Agric 33:345–352