| บทคัดย่อ |
Helianthus tuberosus L. (sunchoke or Jerusalem artichoke) has been widely applied in food and industrial products.
Due to its economical benefits, sunchoke has been of great interest in many areas. Therefore, the aims of this
study were to isolate fungal endophytes from sunchoke and screen for their ability to produce IAA, GA3 and other
plant growth-promoting (PGP) agents. Among a total of 126 isolates, 4 most effective PGP strains were identified
as C. gloeosporioides CPS3/5, G. cingulate NMS1.4, E. rostratum NMS1.5 and Xylariaceae sp. KKL3. In the pot
experiments, several plant growth parameters such as plant height, diameter of stem, SPAD chlorophyll content,
plant biomass, plant root growth, the number of tubers and tuber inulin content in sunchoke inoculated with
these fungal endophytes were significantly higher than those of the uninoculated controls. Outstandingly,
E. rostratum NMS1.5 exhibited the best performance on promoting growth and yield of sunchoke. Interestingly,
strain NMS1.5 is the first member of E. rostratum that is beneficial to plant growth without causing any negative
effects. This study suggested that our fungal endophytes can be effective plant growth promoters for use as
biofertilizers for sunchoke production. |
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