Management of Plant Physiology with Beneficial Bacteria to Improve Leaf Bioactive Profiles and Plant Adaptation under Saline Stress in Olea europea L.
Management of Plant Physiology with Beneficial Bacteria to Improve Leaf Bioactive Profiles and Plant Adaptation under Saline Stress in Olea europea L.
复制标题
DOI：
10.3390/foods9010057
复制
发表时间：
2020-01-01
期刊：
影响因子：
5.2
通讯作者：
Garcia-Villaraco, Ana
中科院分区：
文献类型：
--
作者：
Galicia-Campos, Estrella;Ramos-Solano, Beatriz;Garcia-Villaraco, Ana
全球气候变化加剧了变暖，同时水供应减少，土壤盐分增加，这些因素损害了农业生产。另一方面，使用灌溉系统的新农业发展需要增加水量以实现产量的增加。因此，新的挑战似乎是提高植物适应性和产量，同时限制特定作物，特别是橄榄树的供水。植物已经开发了几种先天机制来克服缺水，使用有益的微生物来改善症状似乎是一种具有挑战性的替代方案。我们的目标是用能够同时触发针对几种机制的植物代谢的有益细菌菌株来改善植物适应性。我们的第二个目标是提高具有生物活性作用的分子的含量，以使修剪残留物增值。为了分析细菌对生长在盐渍土中的橄榄幼苗的影响，测定了光合作用、光合色素、渗透调节物质（脯氨酸和可溶性糖）、活性氧（ROS）清除酶（超氧化物歧化酶-SOD和抗坏血酸过氧化物酶-APX）和分子（酚类、黄酮醇类和橄榄苦苷）。我们发现光合色素，抗氧化分子，净光合作用，水分利用效率是最受影响的参数。大多数菌株减少色素和增加渗透压和酚类，只有一个菌株增加抗高血压分子橄榄苦苷。所有菌株都增加了净光合作用，但只有三个菌株增加了水分利用效率。总之，在10个菌株中，3个提高了水分利用效率，1个增加了修剪残留物的价值。
Global climate change has increased warming with a concomitant decrease in water availability and increased soil salinity, factors that compromise agronomic production. On the other hand, new agronomic developments using irrigation systems demand increasing amounts of water to achieve an increase in yields. Therefore, new challenges appear to improve plant fitness and yield, while limiting water supply for specific crops, particularly, olive trees. Plants have developed several innate mechanisms to overcome water shortage and the use of beneficial microorganisms to ameliorate symptoms appears as a challenging alternative. Our aim is to improve plant fitness with beneficial bacterial strains capable of triggering plant metabolism that targets several mechanisms simultaneously. Our secondary aim is to improve the content of molecules with bioactive effects to valorize pruning residues. To analyze bacterial effects on olive plantlets that are grown in saline soil, photosynthesis, photosynthetic pigments, osmolytes (proline and soluble sugars), and reactive oxygen species (ROS)-scavenging enzymes (superoxide dismutase-SOD and ascorbate peroxidase-APX) and molecules (phenols, flavonols, and oleuropein) were determined. We found photosynthetic pigments, antioxidant molecules, net photosynthesis, and water use efficiency to be the most affected parameters. Most strains decreased pigments and increased osmolytes and phenols, and only one strain increased the antihypertensive molecule oleuropein. All strains increased net photosynthesis, but only three increased water use efficiency. In conclusion, among the ten strains, three improved water use efficiency and one increased values of pruning residues.