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首页> 外文期刊>Journal of Biotechnology >An interdisciplinary research strategy to improve symbiotic nitrogen fixation and yield of common bean (Phaseolus vulgaris) in salinised areas of the Mediterranean basin
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An interdisciplinary research strategy to improve symbiotic nitrogen fixation and yield of common bean (Phaseolus vulgaris) in salinised areas of the Mediterranean basin

机译：跨学科研究策略，以改善地中海盆地盐渍化地区普通豆（菜豆）的共生固氮和产量

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摘要

The main findings of a cooperative research group of agronomists, plant breeders, microbiologists, physiologists and molecularists to improve the symbiotic nitrogen fixation (SN-F) and N-2-dependent yield of common bean under moderate salinity in the Mediterranean basin are summarised. Agronomic surveys in reference production areas show large spatial and temporal variations in plant nodulation and growth, and in efficiency of utilisation of the rhizobial symbiosis. The latter was associated with a large rhizobial diversity, including new bean nodulating species. Macrosymbiont diversity in SNF and adaptation to NaCl was found. However, contrasts between plant genotypes could be altered by specific interactions with some native rhizobia. Therefore, variations in soil rhizobial population, in addition to agronomic practices and environmental constraints, may have contributed to erratic results observed in field inoculations. At the mechanistic level, nodule C and N metabolisms, and abcissic acid content, were related to SNY potential and tolerance to NaCl. Their relation with nodule conductance to O-2 diffusion was addressed by in situ hybridisation of candidate carbonic anhydrase and aquaporin genes in nodule cortex. The limits and prospects of the cooperative strategy are discussed.
机译：总结了一个由农学家，植物育种家，微生物学家，生理学家和分子学家组成的合作研究小组的主要发现，旨在提高地中海盆地中度盐度下普通豆的共生固氮和依赖N-2的产量。参考产区的农艺调查显示，植物结瘤和生长以及根瘤菌共生利用效率的时空变化很大。后者与较大的根瘤菌多样性有关，包括新的豆类结实物种。发现SNF中的巨共生体多样性和对NaCl的适应性。然而，植物基因型之间的差异可以通过与某些天然根瘤菌的特异性相互作用而改变。因此，除了农艺方法和环境限制外，土壤根瘤菌种群的变化还可能导致田间接种中观察到的结果不稳定。在机制水平上，结节C和N的新陈代谢以及癸酸含量与SNY的潜力和对NaCl的耐受性有关。它们与结节电导与O-2扩散的关系通过结节皮层中候选碳酸酐酶和水通道蛋白基因的原位杂交得以解决。讨论了合作战略的局限性和前景。

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