Specificity of local resistance induced in pea leaves by elicitor isolated from Mycosphaerella pinodes.

1986 ◽  
Vol 52 (2) ◽  
pp. 347-348 ◽  
Author(s):  
Hachiro OKU ◽  
Tomonori SHIRAISHI ◽  
Seiji OUCHI
2020 ◽  
Vol 6 (5) ◽  
pp. 563-576

The goal of this article is to examine the introduction of plantations into East Sumatra (Indonesia) in the late nineteenth and early twentieth century. Attention is given to the five most important plantation crops, namely tobacco, rubber, oil palm, tea, and fiber. The article analyzes the economic and social transformation of the region as a consequence of the rapid expansion of plantations. Within a short period of time, East Sumatra emerged to become one of the most dynamic economic regions of Southeast Asia. The development of the region and the needs of a source of protection for Dutch planters in face of fierce competition from other Western companies and local resistance encouraged the Dutch colonial government to establish effective authority in East Sumatra. Received 4th June 2020; Revised 15th September 2020; Accepted 26th September 2020


Author(s):  
Chun-Sheng Jiang ◽  
Dana.B. Sulas-Kern ◽  
Helio R. Moutinho ◽  
Dirk C. Jordan ◽  
Chuanxiao Xiao ◽  
...  

2008 ◽  
Vol 13 (5) ◽  
pp. 102-116 ◽  
Author(s):  
Shamser Sinha

This paper explores the changing postcolonial and racialised politics of belonging in East London. In particular it draws on research with multi-sector professionals and 15 to 18 year old young separated migrants. Separated from parents, these teenagers include those who had applied for asylum and were living under social services care as ‘unaccompanied’ and those living with their extended family. It also includes separated migrants wanting sanctuary, but who had insecure immigration status because their asylum claim had failed, or because they had not yet applied for asylum and had no other visa status. The research focuses on healthcare issues and the broader life-situations of young separated migrants as a way to examine the changing politics of belonging in East London. Features of this politics include a rise in popularity of the Far Right, the impact of immigration and healthcare legislation and practice, and racial hostility. As well as looking at this, there is an exploration of resistance to this racialised political context by teenagers and certain professionals, and the struggle for a convivial multiculture that is a feature of their resistance. The argument here is that the changing racialised politics of belonging in East London: (1) show how underdevelopment, geo-political and postcolonial forces contribute to shaping local experiences of racism (2) sometimes involves, rather than aggressively targets, British citizens from NCWP (New Commonwealth and Pakistani) backgrounds and their descendants, as skin colour becomes less of an articulated symbol of ‘otherness’ than immigration status (3) therefore excludes ‘new migrants’ and especially those seeking sanctuary, such as the young people in this paper, from belonging (4) faces local resistance. However resistance to this politics might be better informed by a greater understanding of how postcolonialism shapes local racism and militates against a convivial multiculture, with sociology playing a role in accomplishing this


2012 ◽  
Vol 92 (2) ◽  
pp. 289-296 ◽  
Author(s):  
R. L. Conner ◽  
B. D. Gossen ◽  
S. F. Hwang ◽  
K. F. Chang ◽  
K. B. McRae ◽  
...  

Conner, R. L., Gossen, B. D., Hwang, S. F., Chang, K. F., McRae, K. B. and Penner, W. C. 2012. Field assessment of partial resistance to mycosphaerella blight in Pisum subspecies accessions. Can. J. Plant Sci. 92: 289–296. Mycosphaerella blight, caused by Mycosphaerella pinodes (Berk. & Bloxam) Vestergr., the teleomorph of Ascochyta pinodes Jones, is an important foliar disease of field pea in the major production areas of the world. Partial resistance to mycosphaerella blight has been reported in some field pea cultivars, but, at best, they are only moderately susceptible. A 3-yr field study was conducted to evaluate the mycosphaerella blight reactions of 28 accessions from a number of subspecies of Pisum sativum L. and one accession of P. fulvum Sibth. A few of the accessions carried mutations for the genes af, tl, and st that affect the morphology of the leaflets, stipules and tendrils. Reactions to mycosphaerella blight were characterized based on the mean of the severity ratings taken on the two final assessment dates before the crop matured and also on the change in mycosphaerella blight severity between these two dates. In many of the accessions, severity ratings were similar to that of the moderately susceptible check cultivar, CDC Peko, while a few had high severity ratings similar to those of the susceptible check cultivars. The accession PI 512079, which has small stipules, branched petioles with many leaflets but no tendrils, had the lowest ratings for mycosphaerella blight severity. Four other accessions exhibited the smallest change in mycosphaerella blight severity at the end of the growing season. Differences in leaf morphology likely influenced the change in disease severity, since all the semi-leafless and leafless accessions had smaller changes in mycosphaerella blight severity than the susceptible check cultivars. In a detached leaf assay with two isolates of Mycosphaerella pinodes (Berk. & Bloxam) Vestergr., the smallest lesions formed on PI 512079, but otherwise the results failed to show a relationship with the observed severity values in the field trials.


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