当前位置: X-MOL 学术Int. J. Plant Prod. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Efficacy of Cladosporium cladosporioides C24G as a Multifunctional Agent in Upland Rice in Agroecological Systems
International Journal of Plant Production ( IF 2.5 ) Pub Date : 2020-03-10 , DOI: 10.1007/s42106-020-00097-2
Amanda Abdallah Chaibub , Thatyane Pereira de Sousa , Maythsulene Inácio Sousa de Oliveira , Marina Teixeira Arriel-Elias , Leila Garcês de Araújo , Marta Cristina Corsi de Filippi

The occurrence of diseases in rice, mainly rice blast (Magnaporthe oryzae), is the main cause of yield reduction, and it has been controlled with the abusive use of fungicides in the conventional production system. To produce rice in an agroecological system, some measures, such as biological control, facilitates the transition from one system to another. The biological agent C24G classified as Cladosporium cladosporioides has been isolated from the phylloplane of rice plants and is a potential antagonist to rice pathogens. The aim of this study was to verify the efficiency of C. cladosporioides C24G under field conditions, in an agroecological system. During two growing seasons, C. cladosporioides was tested in a randomized block design in 4 replicates. The treatments consisted of: microbiolized rice seeds with C. cladosporioides, plant sprayed (2 applications), microbiolized rice seeds with C. cladosporioides + plant sprayed (2 ap.), plant sprayed (8 ap.) and microbiolized rice seeds with C. cladosporioides + plant sprayed (8 ap.) and control (no microbiolization and no spray). We evaluated leaf and panicle blast severity, physiological parameters associated with gas exchange, and grain yield. Leaf and panicle blast suppression was up to 85.58% and 79.63% in growing season 2016/2017, respectively, and 83.06% and 74.98% in growing season 2017/2018. At growing season 2016/2017, we observed an increase of the following parameters: photosynthetic rate (A) of 70.99% and 53.52% and transpiration (E) of 22.98% and 59.73% at vegetative and reproductive stage respectively, stomatal conductance (gs) of 126.66% at reproductive stage, water use efficiency (WUE) was up to 55.29% at vegetative stage, biomass 34.56% and yield 51.30%. At the growing season 2017/2018, we observed an increase at the photosynthetic rate (A) of 29.71%, at reproductive stage, biomass, 89.40%, and yield, 34.19%. We conclude that the treatments, microbiolized rice seeds or plant sprayed, allows the insertion of C. cladosporioides into the agroecological system, facilitating the agroecological transition with considerable grain yield, and leading to a final product without residues.

中文翻译:

Cladosporium cladosporioides C24G 在农业生态系统中作为旱稻多功能药剂的功效

水稻病害的发生,主要是稻瘟病(Magnaporthe oryzae),是减产的主要原因,在常规生产系统中滥用杀菌剂已得到控制。为了在农业生态系统中生产水稻,一些措施,如生物控制,促进了从一个系统到另一个系统的过渡。分类为枝条枝孢菌的生物制剂 C24G 已从水稻植物的叶面中分离出来,是水稻病原体的潜在拮抗剂。本研究的目的是验证 C. cladosporioides C24G 在田间条件下在农业生态系统中的效率。在两个生长季节,C. cladosporioides 在随机区组设计中进行了 4 次重复测试。处理包括:带有枝状孢子菌的微生物化水稻种子,植物喷洒(2 次)、枝状孢子菌微生物化水稻种子 + 植物喷洒 (2 ap.)、植物喷洒 (8 ap.) 和枝状枝孢霉微生物化水稻种子 + 植物喷洒 (8 ap.) 和对照(无微生物化和无喷雾)。我们评估了叶片和穗瘟的严重程度、与气体交换相关的生理参数和谷物产量。2016/2017生长季叶片和穗瘟抑制率分别达到85.58%和79.63%,2017/2018生长季抑制率分别达到83.06%和74.98%。在 2016/2017 生长季节,我们观察到以下参数增加:营养和生殖阶段的光合速率 (A) 分别增加了 70.99% 和 53.52%,蒸腾作用 (E) 分别增加了 22.98% 和 59.73%,气孔导度 (gs)生殖期为 126.66%,水分利用效率(WUE)高达 55。营养期29%,生物量34.56%,产量51.30%。在 2017/2018 生长季节,我们观察到光合速率 (A) 增加了 29.71%,在生殖阶段,生物量增加了 89.40%,产量增加了 34.19%。我们得出结论,微生物化水稻种子或喷洒植物的处理允许 C. cladosporioides 插入农业生态系统,促进农业生态转变,粮食产量可观,并导致最终产品无残留。
更新日期:2020-03-10
down
wechat
bug