Reticulate Evolution in Japanese Sceptridium (Ophioglossaceae), including diploid, tetraploid, and hexaploid species.

Homospory represents an intriguing reproductive strategy, including the potential for gametophytic selfing, considered the ultimate form of selfing. The plants of the fern genus Sceptridium (Ophioglossaceae) are generally considered to be predominantly selfing, making them suitable for analyzing speciation patterns and intraspecific variation characteristic of homosporous plants. The Sceptridium species in Japan not only exhibit variations in ploidy, including diploids, tetraploids, and hexaploids, but also pose taxonomic challenges due to morphologically distinctive forms that are difficult to be assigned to previously described species.

Development and Evaluation of Real-Time Quantitative PCR Assays for Detection of Causing Brown Root Rot Disease.

Brown root rot disease (BRRD) is a highly destructive tree disease. Early diagnosis of BRRD has been challenging because the first symptoms and signs are often observed after extensive tissue colonization. Existing molecular detection methods, all based on the internal transcribed spacer (ITS) region, were developed without testing against global isolates, other wood-decay fungi, or host plant tissues.

Translocation of Fungicides and Their Efficacy in Controlling , the Cause of Brown Root Rot Disease.

Brown root rot disease (BRRD), caused by , is an important tree disease in tropical and subtropical areas. To improve chemical control of BRRD and deter emergence of fungicide resistance in . , this study investigated control efficacies and systemic activities of fungicides with different modes of action.

Development and application of a method to classify airborne pollen taxa concentration using light scattering data.

Although automated pollen monitoring networks using laser optics are well-established in Japan, it is thought that these methods cannot distinguish between pollen counts when evaluating various pollen taxa. However, a method for distinguishing the pollen counts of two pollen taxa was recently developed. In this study, we applied such a method to field evaluate the data of the two main allergens in Japan, Chamaecyparis obtusa and Cryptomeria japonica.

[LONG-TERM RESULTS OF AIRBORNE POLLEN SURVEYS IN THE JAPANESE ARCHIPELAGO FROM THE PERSPECTIVE OF POLLEN ANTIGEN].

Background: In 1986, the Ministry of Health and Welfare started an airborne pollen survey as part of measures against JC pollinosis. We reported the important tree pollen antigens in 2016. We have now estimated the longitudinal investigated results for successful prevention and treatment for allergic symptoms related to grass and weed pollen in Japan.