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在研究双穗型[2]、单穗型[1]和单双穗型[1~+,有一定比率的双穗株]玉米自交系的亚硝酸还原酶活性时,发现各型苗期1～3片展开叶的亚硝酸还原酶的活性最强,而且苗期活性的强弱与以后各期的强弱完全一致。[2]、[1~+]和[1]各型苗期,1～8片叶的亚硝酸还原酶活性强度分别为0.1290、0.0783和0.0628微克分子数/1克绿叶·2小时,[2]与[1~+]或[1]之间的差异显著,t测验均超过1％的显著水平。试验还发现:高配合力的自交系的亚硝酸还原酶活性一般都高于同型的其它自交系,至于亚硝酸还原酶的活性强弱与配合力的高低是否有必然联系,有待进一步研究澄清;研究仍在进行当中。
In the study of nitrite reductase activity of maize inbred lines with double-spike type [2], single-spike type [1] and single and double-spike type [1 ~ + with a certain ratio of double ear plants] The activity of nitrite reductase of 1 ~ 3 leaves was the strongest, and the activity of seedling stage was exactly the same as that of the later stages. The intensity of nitrite reductase activity in leaves of 1 ~ 8 was 0.1290, 0.0783 and 0.0628 micromoles / 1 g green leaves at 2, 1, and 1 seedling stage respectively, ] And [1 ~ +] or [1] significant differences, t test exceeded 1% of the significant level. The results also showed that nitrite reductase activity of high-combining inbred lines was generally higher than other inbred lines of the same type. Whether the activity of nitrite reductase is related to its combining ability needs further study Clarification; research is still ongoing.