| Title: | Variation in Leaf Volatile Emissions in Potato (Solanum tuberosum) Cultivars with Different Late Blight Resistance |
| Author(s): | Agho CA; Runno-Paurson E; Tahtjarv T; Kaurilind E; Niinemets U; |
| Address: | "Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51006 Tartu, Estonia. The Centre of Estonian Rural Research and Knowledge, J. Aamisepa 1, 48309 Jogeva, Estonia. Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia" |
| ISSN/ISBN: | 2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) play key roles in plant abiotic and biotic stress resistance, but even for widespread crops, there is limited information on variations in the magnitude and composition of constitutive VOC emissions among cultivars with varying stress resistance. The foliage VOC emissions from nine local and commercial potato cultivars (Alouette, Sarme, Kuras, Ando, Anti, Jogeva Kollane, Teele, 1681-11, and Reet) with medium to late maturities and varying Phytophthora infestans (the causative agent of late blight disease) resistance backgrounds were analyzed to gain an insight into the genetic diversity of constitutive VOC emissions and to test the hypothesis that cultivars more resistant to Phytophthora infestans have greater VOC emissions and different VOC fingerprints. Forty-six VOCs were identified in the emission blends of potato leaves. The majority of the VOCs were sesquiterpenes (50% of the total number of compounds and 0.5-36.9% of the total emissions) and monoterpenes (30.4% of the total number of compounds and 57.8-92.5% of the total VOC emissions). Qualitative differences in leaf volatiles, mainly in sesquiterpenes, were related to the potato genotype background. Among the volatile groups, the monoterpenes alpha-pinene, beta-pinene, Delta(3)-carene, limonene, and p-cymene, the sesquiterpenes (E)-beta-caryophyllene and alpha-copaene, and green leaf volatile hexanal were the major volatiles in all cultivars. A higher share of VOCs known to have antimicrobial activities was observed. Interestingly, the cultivars were grouped into high and low resistance categories based on the VOC profiles, and the total terpenoid and total constitutive VOC emission scale positively with resistance. To support and expedite advances in breeding for resistance to diseases such as late blight disease, the plant research community must develop a fast and precise approach to measure disease resistance. We conclude that the blend of emitted volatiles is a fast, non-invasive, and promising indicator to identify cultivars resistant to potato late blight disease" |
| Keywords: | Solanum tuberosum chemodiversity late blight resistance volatile organic compound emission; |
| Notes: | "PubMed-not-MEDLINEAgho, C A Runno-Paurson, E Tahtjarv, T Kaurilind, E Niinemets, U eng P190259PKTT/Estonian University of Life Sciences project (base funding)/ 8F160018PKTF/European Regional Development Fund (Centre of Excellence EcolChange)/ Switzerland 2023/06/10 Plants (Basel). 2023 May 25; 12(11):2100. doi: 10.3390/plants12112100" |
