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Calcium-dependent protein kinases (CPKs) are a class of plant-specific key signal transduction factors. In pineapple, an important tropical economic crop, the identification, classification, and functional characterization of the CPKs gene family are still in their infancy, and the molecular mechanisms by which they participate in stress responses remain unclear, which limits their application in the improvement of stress-resistant pineapple varieties. In this study, we systematically investigated the AcoCPKs gene family in pineapple by integrating genomic analysis, chromosomal localization, bioinformatic prediction, and qRT-PCR–based molecular approaches. A total of 18 AcoCPKs family members were identified at the whole-genome level in pineapple. Chromosomal mapping showed that these AcoCPKs genes are unevenly distributed across the nine chromosomes of pineapple. Bioinformatic analysis revealed that all AcoCPKs sproteins share similar conserved motifs and domain architectures. qRT-PCR expression profiling further demonstrated that the 18 AcoCPKs genes are expressed in multiple tissues, including fruits, leaves, fruit peduncles, and flower buds, with distinct tissue-specific expression patterns; moreover, the transcription levels of several AcoCPKs genes were markedly up-regulated under high-temperature, low-temperature, and NaCl salt stress treatments.Taken together, this study systematically elucidates the physicochemical properties, genetic characteristics, and stress-responsive expression patterns of members of the AcoCPKs gene family in pineapple. These findings not only provide an important theoretical basis for further dissecting the molecular mechanisms underlying AcoCPKs-mediated stress responses in pineapple, but also lay a solid foundation for the targeted improvement of stress tolerance and the breeding of high-quality, stress-resistant pineapple cultivars through gene editing, transgenic approaches, and other modern molecular breeding technologies.
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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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