排序方式: 共有12条查询结果,搜索用时 15 毫秒
1.
2.
3.
The in vitro antifungal properties of chitosan and its role in protection of soybean from a sudden death syndrome (SDS) were evaluated. Chitosan inhibited the radial and submerged growth of F. solani f. sp. glycines with a marked effect at concentrations up to 1mg/ml indicating antifungal property and at 3mg/ml was able to delay SDS symptoms expression on soybean leaves for over three days after fungal inoculation when applied preventively. Chitosan was able to induce the level of chitinase activity in soybean resulting in the retardation of SDS development in soybean leaves. However, the SDS symptoms gradually appeared and were associated with the reduction of chitinase activity level after five days of infection period. These results suggested the role of chitosan in partially protecting soybeans from F. solani f. sp. glycines infection. 相似文献
4.
B. E. Brown R. P. Dunne N. Phongsuwan L. Patchim J. M. Hawkridge 《Coral reefs (Online)》2014,33(2):395-401
The reef coral Goniastrea aspera is regarded as one of the most environmentally tolerant species on Indo-Pacific reefs. Its demise, following a severe bleaching event in the Andaman Sea in the north-eastern Indian Ocean in 2010, was surprising in view of the rapid recovery of co-existing species such as Porites lutea. Demographic studies of G. aspera at this site showed the population was mainly composed of large individuals, which recruited in the early 1990s. These results, and size-specific mortality observed in G. aspera, post-bleaching, suggest that factors, related to size and age, may have contributed to the coral’s marked decline. 相似文献
5.
6.
Sea level in the Indian Ocean is subject to considerable temporal and spatial variabilities. During the period 1960–2009 at
Phuket, Thailand, in the NE Indian Ocean, mean sea level increased by 2.7 mm y−1. Regular monitoring of coral cover on fringing reef flats at Phuket since 1979 revealed a sensitive response of this habitat
to both transient sea-level depressions and sea-level elevation. Since 1987 when more frequent sampling began, coral cover
was positively correlated with the mean sea level experienced over the preceding months. Changing mean sea level explained
a high proportion of the observed variation in cover, with overall increasing sea levels and a lack of negative sea-level
anomalies promoting cover on the outer reef flats. Concomitantly, there have been no changes in reef community structure or
any apparent shifts in zonation patterns across the reef. While future benefits of continued increases in mean sea level on
reef flats in the region will be constrained by the frequency and intensity of sea-level depressions associated with the Indian
Ocean Dipole, and bleaching events, the overall picture for these shallow reefs is a positive one as they respond to increasing
sea level and show rapid recovery from environmental disturbances. 相似文献
7.
The 2004 tsunami left a discontinuous pattern of destruction in the reefs along Andaman Sea coast of Thailand. Here, a comparative
assessment of coral recruitment was carried out to assess differences in recovery between damaged and undamaged sites in near-shore
fringing reefs 1 and 3 years after the tsunami. Settlement plates showed high frequencies of coral spat after 4 months (<17
spat tile−1) in both, damaged and undamaged locations. Field surveys carried out 3 years after the tsunami on natural substrate confirmed
that tsunami damage did not suppress recruitment in damaged sites relative to no impacted controls. New and stable settlement
space along with unabated larval supply supported post-tsunami recruit densities up to 7.2 m−2 year−1. Mean recruit densities were found at the level of post-storm situations with rapid recovery success, suggesting that the
duration of disturbance, degree of sorting and, hence, stability of coral rubble is a key determinant of recruitment success.
Low regeneration success of some species e.g. branching acroporids and rebounding tourism industry at sites like Patong and
partly around the Phi Phi Islands (dense carpets of filamentous algae) led to the assumption of selectivity and eventually
to an alternation of the coral community even though live coral cover might be recovered soon. 相似文献
8.
Jintana Engkhaninun Sinchai Chatasiri Chaiwat To-anun Niphon Visarathanonth Makoto Kakishima Yoshitaka Ono 《Mycoscience》2005,46(3):137-142
Ten species of rust fungi (Crossopsora 2, Maravalia 1, Pileolaria 1, Puccinia 1, Ravenelia 1, Sphaerophragmium 1, Uredo 2, and Uromyces 1) are newly recorded together with six new host plants in Thailand.Contribution no. 194, Laboratory of Plant Parasitic Mycology, Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan 相似文献
9.
Amnat Eamvijarn Leka Manoch Chiradej Chamswarng Onuma Piasai Niphon Visarathanonth J. Jennifer Luangsa-ard Anake Kijjoa 《Mycoscience》2013,54(6):401-405
A new species of Aspergillus section Fumigati, Aspergillus siamensis, isolated from coastal forest soil in Samaesarn island, Chonburi province, Eastern Thailand, is described and illustrated. This species is characterized by its broadly lenticular ascospores with two wide equatorial crests and finely spinulose and rugose convex surfaces and produced pale pinkish exudates after 14 d incubation on Czapek agar. The validation of this new species was supported further by analyses of the β-tubulin, calmodulin and actin gene sequences. 相似文献
10.
Roder C. Jantzen C. Schmidt G. M. Kattner G. Phongsuwan N. Richter C. 《Coral reefs (Online)》2011,30(1):57-69
The metabolic plasticity of the two mounding coral species Porites lutea (Milne-Edwards and Haime, 1860) and Diploastrea heliopora (Lamarck, 1816) was investigated in the Similan Islands (Thailand), an offshore Andaman Sea island group subjected to large amplitude internal waves (LAIW). Nutrient concentrations were highly correlated with LAIW intensity and contributed to 3- and 10-fold higher symbiont densities in P. lutea and D. heliopora, respectively, along with elevated pigment concentrations, protein content, host tissue, and symbiont biomass. The comparison of LAIW-exposed and LAIW-sheltered island faces, and LAIW-intense and LAIW-weak years suggests a species-specific metabolic plasticity to LAIW, where D. heliopora benefits more from increased nutrient and organic matter availability than P. lutea. The ubiquitous LAIW in Southeast Asia and beyond may provide so far unexplored clues to coral acclimatization to disturbances on various scales, and hence, a potential key to coral resilience to climate change. 相似文献