Vinokurov Konstantin, Taranushenko Yuliya, Krishnan Natraj, Sehnal Frantisek
Entomological Institute, Biology Centre AV CR, Branisovská 31, 370 05 Ceské Budejovice, Czech Republic.
J Insect Physiol. 2007 Aug;53(8):794-802. doi: 10.1016/j.jinsphys.2007.02.019. Epub 2007 Mar 18.
Representative species, two from each of the cockroach families Blattidae, Blattellidae, and Blaberidae, have similar morphology of the digestive tract but differ in the physiology of digestion. The pH of crop and along the midgut varies in different species from 5.9 to 9.0 and the redox parameter from 10.1 to 12.9. Activities of proteinases and amylases in comparable gut regions differ among the species up to 100 times. Proteolytic activity is high in the midgut and moderate in the crop of Blattidae; in the other species, it is very low in the crop and increases to a moderate level in the posterior half of midgut (PM). The level of amylolytic activity is similar in the examined gut compartments of Blattidae and Blattellidae but low in the PM of Blaberidae. Blaberidae are also characterized by a high potential of the salivary glands, crop, and midgut to inhibit subtilisin, trypsin, and chymotrypsin. Inhibition of these proteinases by the extracts of salivary glands and gut is several orders of magnitude lower and often undetectable in the representatives of Blattidae and Blattellidae.
代表性物种，分别来自蜚蠊科、姬蠊科和硕蠊科的各两个物种，具有相似的消化道形态，但消化生理有所不同。嗉囊和中肠的pH值在不同物种中从5.9到9.0不等，氧化还原参数从10.1到12.9。在可比的肠道区域，不同物种中蛋白酶和淀粉酶的活性差异高达100倍。蜚蠊科中肠的蛋白水解活性高，嗉囊的蛋白水解活性中等；在其他物种中，嗉囊的蛋白水解活性非常低，在中肠后半段（PM）增加到中等水平。蜚蠊科和姬蠊科被检查的肠道区域的淀粉水解活性水平相似，但硕蠊科中肠后半段的淀粉水解活性较低。硕蠊科的唾液腺、嗉囊和中肠对枯草杆菌蛋白酶、胰蛋白酶和胰凝乳蛋白酶也具有较高的抑制潜力。在蜚蠊科和姬蠊科的代表物种中，唾液腺和肠道提取物对这些蛋白酶的抑制作用要低几个数量级，且通常无法检测到。
