| Effects of Trichoderma longibrachiatum T6 on growth promotion and physiological characteristics of Brassica chinensis under different seed treatment methods |
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| DOI：10.7606/j.issn.1000-7601.2023.01.21 |
| Key Words: Trichoderma longibrachiatum T6 Brassica chinensis L. growth promotion physiological characteristics |
| Author Name | Affiliation | | GUO Caiping | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | ZHANG Lu | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | SUN Chenxi | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | MA Yaojie | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | LI Xinran | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | JING Tao | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | XU Bingliang | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China | | ZHANG Shuwu | College of Plant Protection, Gansu Agricultural University, Engineering Laboratory for Biological Control of Crop Diseases and Pests, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In this study, the effects of Trichoderma longibrachiatum T6 strain and its spore suspension and fermentation filtrate on the changes of seed activity, root development, leaf chlorophyll content and soluble protein content of Brassica chinensis were evaluated using different seed treatment methods of water\|agar culture, soaking and root irrigation. The results showed that the relative growth rates of seed germination rate, germination index, radicle length, plumule length, fresh weight and dry weight were increased by 2.51%, 20.55%, 70.79%, 21.98%, 32.00% and 30.00% after treating with T. longibrachiatum T6 by the method of water\|agar culture, respectively. The relative growth rates of total projected root area, total root surface area, average root diameter, total root volume and root tip number were increased by 58.49%, 58.79%, 18.18%, 100.00% and 77.88%, respectively. Using the seed soaking method, the T. longibrachiatum T6 spore suspension (1.0×107 cfu·mL-1) significantly increased the seed germination rates, germination index, radicle length, plumule length, fresh weight and dry weight and the relative growth rates by 2.06%, 19.60%, 82.21%, 43.36%, 31.58% and 40.00%, respectively. The relative growth rates of total projected root area, total root surface area, average root diameter, total root volume and root tip number were increased by 44.19%, 45.52%, 13.04%, 100.00% and 28.57%, respectively. Greenhouse experiment showed that the fermentation filtrate of T. longibrachiatum T6 significantly increased the chlorophyll and soluble protein contents of B. chinensis seedlings. Compared with the control, the relative growth rates of chlorophyll and soluble protein contents were increased by 31.95% and 11.40% after treating with the fermentation filtrate of T. longibrachiatum T6, respectively. Therefore, T. longibrachiatum T6 strain exhibited significantly promoting effect on B. chinensis growth by the application of water agar culture, soaking and root irrigation methods. |
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