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野生四倍体二粒小麦具有许多对六倍体小麦(普通小麦)有用的性状。业已发现2个野生近缘二粒小麦(P1428042和P1428109)的叶片大小相近,但单位叶面积的净CO_2同化率(A)相差约30％。为了解释它们与六倍体普通小麦(TAMW-101)之间光合率的差异,用每个基因型新展叶测定了CO_2(空气中氧气浓度20和210ml/L)、光、湿度、1,5-二磷酸核酮糖羧化酶活性和蔗糖浓度对光合作用的影响,并用光学和电子显微镜观察了与光合作用有关的解剖学特点。结果表明:在不同的CO_2、光、湿度水平下,P1428109的A值高于P1428042的。P1428109叶片的Rubisco活性高于P1428042的。P1428042叶片蔗糖浓度高于P1428109。而2个野生二粒小麦间无解剖学上的差异。因此,2个野生二粒小麦的光合差异是生物化学的,而不是解剖学的差异。
Wild tetraploid barley has many useful traits for hexaploid wheat (Triticum aestivum). It has been found that the leaf sizes of two wild relatives of two wheat cultivars (P1428042 and P1428109) are similar in size, but the net CO 2 assimilation rate (A) per leaf area differs by about 30%. In order to explain the difference in photosynthetic rate between them and hexaploid Triticum aestivum (TAMW-101), CO 2 (20 and 210 ml / L in air), light, humidity, The effects of ribulose-5-bisphosphate carboxylase activity and sucrose concentration on photosynthesis were investigated. The anatomical characteristics of photosynthesis were observed by optical and electron microscopy. The results showed that the A value of P1428109 was higher than that of P1428042 at different CO2, light and moisture levels. Rubisco activity of P1428109 leaves was higher than that of P1428042. P1428042 leaf sucrose concentration higher than P1428109. There were no anatomical differences between the two wild double grain wheat. Therefore, the photosynthetic differences between the two wild balsam are biochemical rather than anatomic differences.