A coumarin analogue NFA from endophytic Aspergillus fumigatus improves drought resistance in rice as an antioxidant

Table 1 Characteristics of twelve endophytes isolated from M. laxiflora

Strain number	Tissue origin	Isolated condition^a	T-AOC (U/mL) ^b	Serial number in Genbank	The most homologous species^c	Similarity (%)	Survival rate (%)^d
HG-2	Root	AF	24.85 ± 0.22	MK450292	Fusarium concentricum	99	0
HY-1	Leaf	AF	34.88 ± 0.80	MK450293	Aspergillus oryzae	98	0
MG-23	Root	AF	21.32 ± 0.10	MK450294	Aspergillus tubingensis	99	0
MY-15	Leaf	AF	27.47 ± 0.92	MK450295	Aspergillus flavus	98	0
MY-22	Leaf	AF	18.56 ± 0.28	MK450296	Alternaria alternata	98	0
QY-1	Leaf	BF	55.90 ± 0.84	KU954091	Chaetomium globosum	100	23.33
SG-16	Root	BF	19.65 ± 0.13	MK450297	Fomitopsis palustris	96	0
SG-17	Root	BF	29.64 ± 0.17	MK450298	Aspergillus fumigatus	99	36.67
SG-4	Root	BF	15.85 ± 0.36	MK450299	Penicillium oxalicum	98	16.67
SG-5	Root	BF	20.20 ± 0.46	MK450300	Alternaria tenuissima	99	0
SG-6	Root	BF	21.03 ± 0.17	MK450301	Pestalotiopsis microspora	99	0
SY-15	Leaf	BF	25.99 ± 0.47	KX822145	Penicillium oxalicum	98	13.33
Average T-AOC of 163 fungi			8.22 ± 1.76	–	–	–	–
NFA			–	–	–	–	50
Proline (Pro)			–	–	–	–	30
Ascorbic acid (Vc)			–	–	–	–	0

^aNote: AF means that the fungus was isolated from M. laxiflora plants after flooding, and BF before flooding. ^bT-AOC: Total antioxidant capacity. ^cThe most homologous species are obtained by ITS sequence alignment in Genbank [34]. ^dSurvival rate was investigated by applying the crude extract of endophytic fungi or other substances to 30 rice seedlings after drought

ISSN: 1471-2180