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CCCH-type zinc finger protein plays an important regulatory role in plant growth, development, and response to stress. In this study, a zinc finger protein gene MiZFP11 was isolated from macadamia (Macadamia integrifolia) variety JW and Guire No.1 by RT-PCR, and the structural characteristics and subcellular localization of its encoded protein was analyzed. Expression levels of MiZFP11 in drought and high temperature treatments and the tissues of macadamia were investigated by quantitative real-time PCR. RT-PCR cloning showed that a new gene MiZFP11 from macadamia was highly homologous to CCCH zinc finger protein genes, with GenBank registration number MT332641. Bioinformatics analysis indicated that MiZFP11 belonged to C3H13 subclass zinc finger protein with an LCCL domain at relatively conservative C-terminus. Analysis of protein basic properties indicated that MiZFP11 was an unstable hydrophilic protein without signal peptide and transmembrane segment, which was mainly phosphorylated with serine. Protein structure analysis showed that the secondary and tertiary structures of MiZFP11 were mainly composed of random coil,α-helix and extended strand. Transient expression of tobacco leaves and the confocal microscopy detection indicated that MiZFP11 was localized in the nucleus, which was consistent with the subcellular localization predicted results. qRT-PCR analysis showed that expression of MiZFP11 gene was highest in leaves of macadamia variety JW and Guire No.1, next was in roots, small flowers and small fruits, with the lowest in stems. Under drought stress for 1-36 hours, expression level of MiZFP11 gene in leaves increased with an “up-down-up-down” pattern in JW and an “up-down” pattern in Guire No.1. Under high temperature stress for 1-36 hours, expression level of MiZFP11 in leaves increased with “up-down” patterns in JW and Guire No.1, and expression level in JW was significantly higher than that of Guire No.1. Therefore, MiZFP11 was significantly expressed in different tissues of macadamia, and was significantly up-regulated under drought and high temperature stresses, which speculated that MiZFP11 gene plays an important role in the growth and development of macadamia tissues and the response to drought and high temperature stresses.
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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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