Effect of Endophytic Fungi from Rhynchostylis gigantean (Lindl.) Ridl. on Seed Germination and Seedling Development of Oryza sativa L., Brassica oleracea L. and R. gigantean

Authors

Abstract

The effect of endophytic fungi from Rhynchostylis gigantean (Lindl.) Ridl. that has the ability to promote the seed germination and seedling development of Oryza sativa, Brassica oleracea, and R. gigantean was investigated and isolated. The results revealed that 8 fungal isolates were isolated from the orchid and produce indole acetic acid (IAA) content in a range of 0.52-2.54 µg/mL. The isolate 2 produced maximum levels of IAA content (2.54 µg/mL), followed by isolate 1 (1.84 µg/mL) and 7 (0.82 µg/mL), respectively. The efficiency of seed germination and seedling development of fungal isolates on O. sativa and B. oleracea seeds revealed that the growth in O. sativa seedlings were significantly different (p<0.05) between fungal isolates. Fungal isolates 2 and isolate 4 exhibited the maximum root length (5.19 cm) and shoot length (6.88 cm), respectively. The growth of B. oleracea seedlings showed that isolate 7 had the highest root length (1.86 cm). The effect of culture broth of fungal isolates on the development of R. gigantean protocorms showed that fungal isolates 1, 2, 4, and 5 showed shoot significant difference (p<0.05) with control. The highest percentage of shoot development (45.71%) is medium supplemented with fungal isolate 2 and isolates 1 showed the highest of width (0.158 cm) and length (0.209 cm) of protocorms. The results implied that endophytic fungi from R. gigantean has the efficiency to promote the seed germination and seedling development of O. sativa, B. oleracea, R. gigantean that could be further developed for plant growth regulator in the future. Keywords :  endophytic fungi, orchid, plant growth regulator, indole acetic acid

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Published

2022-06-06