Alleviation of salinity stress in rice plant by encapsulated salt tolerant plant growth promoting bacteria Pantoea agglomerans strain KL and its root colonization ability
Alleviation of salinity stress in rice plant by encapsulated salt tolerant plant growth promoting bacteria Pantoea agglomerans strain KL and its root colonization ability
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DOI：
10.1080/03650340.2019.1584395
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发表时间：
2019-12-06
影响因子：
2.4
通讯作者：
Dandge, Padma B.
中科院分区：
文献类型：
--
作者：
Bhise, Komal K.;Dandge, Padma B.
本研究表明，0至8%的NaCl胁迫对植物生长促进性状，如ACC（1-氨基环丙烷-1-羧酸）脱氨酶，磷酸盐溶解，IAA（吲哚乙酸），氨和胞外多糖生产的成团泛菌菌株KL分离自Kolhapur，马哈拉施特拉邦，印度盐胁迫土壤的影响。在盆栽条件下，研究了成团青霉KL菌株的微囊接种物（EI）和游离接种物（FI）对缓解盐胁迫（100 mM NaCl）和促进水稻生长的作用。本研究表明，添加EI能显著提高植株的生长，增加植株的长度、生物量和光合色素，降低脯氨酸和丙二醛的含量。此外，EI补充植物表现出降低钠和增加钙和钾的吸收。根定殖研究表明，10天后被包囊的生物体存活较少。然而，在20和30天后观察到大量的菌落形成单位。此外，扫描电子显微镜分析盐胁迫植物根显示了巨大的根定殖EI。因此，本研究证明了聚团青霉KL菌株在表达植物生长促进性状和通过EI改善盐胁迫方面的潜力。
The present investigation indicates the effects of 0 to 8% NaCl stress on plant growth promoting traits such as ACC (1-aminocyclopropane-1-carboxylate) deaminase, phosphate solubilization, IAA (indole acetic acid), ammonia and exopolysaccharide production of Pantoea agglomerans strain KL isolated from salt-stressed soil of Kolhapur, Maharashtra, India. We have studied the effect of encapsulated inoculum (EI) and free inoculum (FI) of P. agglomerans strain KL on the alleviation of salinity stress (100 mM NaCl) and promotion of rice plant growth in the pot experiment. The present study showed significant improvement in plant growth supplemented with EI in terms of increased length, biomass, photosynthetic pigment and decreased level of proline, malondialdehyde. Furthermore, EI supplemented plant exhibited decreased sodium and increased calcium and potassium uptake. Root colonization study revealed the survival of encapsulated organism which was less after 10 days. However, a significant number of colony forming unit were noted after 20 and 30 days. In addition, the scanning electron microscopic analysis of salt-stressed plant root showed tremendous root colonization by EI. Hence, the present study demonstrates the potency of P. agglomerans strain KL in the expression of plant growth promoting traits and amelioration of salt stress by EI.