Morphological Adaptations to Drought and Reproductive Strategy of the Moss Syntrichia caninervis in the Gurbantunggut Desert, China
文献类型：SCI/SSCI论文
| 作者 | Xu M. |
| 发表日期 | 2011 |
| 关键词 | adaptation morphological structure protonema development reproductive strategy Syntrichia caninervis Mitt biological soil crusts sex expression northwestern china wind erosion leaf regeneration mojave desert disturbance tolerance stress infiltration |
| 英文摘要 | The biological soil crusts (BSCs) in the Gurbantunggut Desert, the largest fixed and semi-fixed desert in China, feature moss-dominated BSCs, which play an indispensable role in sand fixation. Syntrichia caninervis Mitt. (S. caninervis) serves as one of the most common species in BSCs in the desert. In this study we examined the morphological structure of S. caninervis from leafy gametophyte to protonema using light and scanning electron microscopy (SEM). We also examined the relationships between the morphological structure of S. caninervis and environmental factors. We found that: (1) this moss species is commonly tufted on the sand surface, and its leaves are folded upwards and twisted around the stem under dry conditions; (2) the cells on both upper and lower leaf surfaces have C-shaped dark papillae, which may reflect sunlight to reduce the damage from high temperature; (3) the leaf costa is excurrent, forming an awn with forked teeth; and (4) the protonema cells are small and thickset with thick cell walls and the cytoplasm is highly concentrated with a small vacuole. In addition, we also found that the protonema cells always form pouches on the tip of the mother cells during the process of cell polarization. Our results suggest that S. caninervis has, through its life cycle, several morphological and structural characteristics to adapt to dry environmental conditions. These morphological features of S. caninervis may also be found in other deserts in the world due to the world-wide distribution of the species. |
| 出处 | Arid Land Research and Management |
| 卷 | 25 |
| 期 | 2 |
| 页 | 116-127 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1532-4982 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22245]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu M.. Morphological Adaptations to Drought and Reproductive Strategy of the Moss Syntrichia caninervis in the Gurbantunggut Desert, China. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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