Cassava (Manihot esclenta Crantz) has excellent planting characteristics such as drought resistance, barren tolerance and strong adaptability, and is the main food crop for more than 1 billion people in the world. CMLs (calmodulin-like proteins) are plant calmodulin-like receptors in cells. They interact with other calmodulin-binding proteins to regulate cellular physiological processes and participate in plant stress response. MeCML42 gene in cassava is induced by drought stress. In order to study the drought stress response pathway involved in this gene, yeast two-hybridization was used to screen the interacting proteins of MeCML42. Firstly, the decoy vector pGBKT7-MeCML42 was constructed by homologous recombination technique, and the self-activation experiment showed that MeCML42 protein had no self-activation activity. The toxicity test showed that MeCML42 protein was not toxic to yeast and did not affect the normal growth of yeast. The cDNA library was screened by yeast two-hybridization and 7 candidate interacting proteins were obtained. The interaction between MeCML42 and thioredoxin MeCDSP32 was verified by yeast double heterogyclic experiment. Mannitol simulation of drought stress showed that the expressions of MeCML42 and MeCDSP32 were both induced by drought, and the expression levels were the highest at 48 h under stress. These results indicated that MeCML42 and MeCDSP32 were synergistically involved in cassava's response to drought stress. The results of this study provide a new basis for MeCML42 to participate in cassava response to drought stress.
| 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 |