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Five sweet potato cultivars with significant differences in germination, Jixu 23, Yanshu 25, Red Banana, Taizhong No. 6 and Xinxiang, were used as the test materials. During the storage period, samples were taken regularly to analyze the changes of endogenous hormones and carbohydrate metabolism in the storage roots. Storage roots after storage were planted for seedlings in small arch sheds and investigated. The results showed that Jixu 23, Yanshu 25 and Red Banana germinated earlier, and the number of seedlings picked was significantly more than that of Taizhong 6 and Xinxiang. At the end of storage and before seeding, the starch content and amylopectin content of storage roots in Jixu 23, Yanshu 25 and Red Banana were significantly higher than those of Taizhong No. 6 and Xinxiang, Jixu 23, Yanshu 25 and Red Banana. Higher content of amylopectin and amylopectin was mainly due to the smaller decrease during storage. The total amylase and α-amylase activity of storage roots in Jixu 23, Yanshu 25 and Red Banana were significantly higher than that of Taizhong No. 6 and Xinxiang, and the α-amylase activity of storage roots in Jixu 23, Yanshu 25 and Red Banana were higher than that of Jixu 23, Yanshu 25 and Red Banana. This is mainly due to the larger increase during storage. At the end of storage and before seeding, compared with Taizhong No. 6 and Xinxiang, Jixu 23, Yanshu 25 and Red Banana had higher GA content, lower IAA content, and higher GA/ABA and ZR/IAA of storage roots. That is, at the end of storage and before seeding, high starch and amylopectin content, high α-amylase activity, high endogenous GA content, and low IAA content in storage roots are physiological indicators of good germination.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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