Examining ozone susceptibility in the genus Musa (bananas).
Examining ozone susceptibility in the genus Musa (bananas).
复制标题
检查芭蕉属（香蕉）的臭氧敏感性。
DOI：
10.1071/fp22293
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Farha MN
中科院分区：
文献类型：
--
作者：
Farha MN
对流层臭氧（O3）是一种全球性的空气污染物，对植物生长产生不利影响。虽然O3对某些热带商品作物的影响以前已经研究过，但没有关于泛热带作物香蕉（芭蕉属）的信息。为了解决这个问题，我们将澳大利亚的主要香蕉品种，威廉姆斯，在开顶室的[O3]范围。此外，我们研究了46种不同的芭蕉线生长在一个共同的花园中的变化，在三个性状，假设形状响应O3：（1）叶质量单位面积;（2）内在水分利用效率;（3）总抗氧化能力。我们发现，O3暴露有一个显着的影响，生物量的CV。威廉姆斯，与显着减少假茎和吸盘生物量增加[O3]。这是伴随着一个显着增加总的抗氧化能力和酚类物质的浓度在老年人，但不是年轻的，叶，表明累积O3暴露的重要性。使用观察到的性状多样性，我们预计O3耐受性之间的46个香蕉线生长在共同的花园。其中，CV。威廉姆斯是最耐O3的品种之一。这表明其他基因系可能更容易受到影响，这对整个热带地区的香蕉生产和粮食安全产生了影响。
Tropospheric ozone (O3) is a global air pollutant that adversely affects plant growth. Whereas the impacts of O3 have previously been examined for some tropical commodity crops, no information is available for the pantropical crop, banana (Musa spp.). To address this, we exposed Australia’s major banana cultivar, Williams, to a range of [O3] in open top chambers. In addition, we examined 46 diverse Musa lines growing in a common garden for variation in three traits that are hypothesised to shape responses to O3: (1) leaf mass per area; (2) intrinsic water use efficiency; and (3) total antioxidant capacity. We show that O3 exposure had a significant effect on the biomass of cv. Williams, with significant reductions in both pseudostem and sucker biomass with increasing [O3]. This was accompanied by a significant increase in total antioxidant capacity and phenolic concentrations in older, but not younger, leaves, indicating the importance of cumulative O3 exposure. Using the observed trait diversity, we projected O3 tolerance among the 46 Musa lines growing in the common garden. Of these, cv. Williams ranked as one of the most O3-tolerant cultivars. This suggests that other genetic lines could be even more susceptible, with implications for banana production and food security throughout the tropics.