22 Chen GX, Zhang RX (2004). Study on characteristics of PS II of flag leaves during photosynthetic functional decline process of yangmai 5 ( Triticum aestivum L). Scientia Agricultura Sinica 37, 36-42.
[9]
23 Evans JR (1983). Nitrogen and photosynthesis in the flag leaf of wheat ( Triticum aestivum L.). Plant Physiol 72, 297-302.
[10]
24 Frederick JR, Camberato JJ (1994). Leaf net CO 2 - exchange rate and associated leaf traits of winter wheat grown with various spring nitrogen fertilization rates. Crop Sci 34, 432-439.
[11]
25 Ku MSB, Agarie S, Nomura M, Fukayama H, Tsuchida H, Ono K, Hirose S, Toki S, Miyao M, Matsuoka M (1999). High-level expression of maize phosphoenolpyruvate car- boxylase in transgenic rice plants. Nat Biotechnol 17, 76- 80.
[12]
26 McCaig TN, Clarke JM (1982). Seasonal changes in nonstructural carbohydrate levels of wheat and oats grown in a semiarid environment. Crop Sci 22, 963-970.
[13]
27 Seeni SA, Gnanam A (1981). Isozymes of glucose-6- phosphate dehydrogenase and NAD + -malate dehydrogenase in shoot-forming foliar discs of tobacco. Plant Cell Physiol 22, 969-977.
