Pigeonpea is an important food and forage crop in the tropics. In order to dissect the physiological characteristics of pigeonpea under cold stress and its cold tolerance, eight seedlings of pigeonpea were tested and analyzed by 8 physiological indexes under 4 ℃ stress, and cold tolerance of pigeonpea were evaluated by subordinate function value method in this study. The results showed that with the prolongation explored to cold stress, REC, SS, MDA and Pro increased respectively, SOD and POD increased firstly and then decreased, and Chl showed a general trend of decline, and the variation of CAT activity was significant difference only in P2 among the 8 accessions. The cold tolerance of the 8 accessions was in the order: Miandian>Danzhou>170306001>060302216>ICPL7086>Nan 02137>Guangxi>Qiongzhong. The content of Chl, SOD and POD activity were significantly correlated with cold tolerance of pigeonpea, which could be the reliable physiological indexes to evaluate the cold tolerance of pigeonpea.
| 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 |