التفاصيل البيبلوغرافية
| العنوان: |
Blumeria graminis Interactions with Barley Conditioned by Different Single R Genes Demonstrate a Temporal and Spatial Relationship Between Stomatal Dysfunction and Cell Death. |
| المؤلفون: |
Prats, Elena1 elena.prats@ias.csic.es, Gay, Alan P.2, Roberts, Peter C.2, Thomas, Barry J.2, Sanderson, Ruth2, Paveley, Neil3, Lyngkjæer, Michael F.4, Carver, Tim L. W.2, Mur, Luis A. J.2 |
| المصدر: |
Phytopathology. Jan2010, Vol. 100 Issue 1, p21-32. 12p. 3 Diagrams, 1 Chart, 6 Graphs. |
| مصطلحات موضوعية: |
*BARLEY, *STOMATA, *CELL death, *HORDEUM, *INFECTION |
| مستخلص: |
Hypersensitive response (HR) against Blumeria graminis f. sp. hordei infection in barley (Hordeum vulgare) was associated with stomata "lock-up" leading to increased leaf water conductance (g1). Unique spatiotemporal patterns of HR formation occurred in barley with Mlal, Mla3, or MILa R genes challenged with B. graminis f. sp. hordei. With Mlal, a rapid HR, limited to epidermal cells, arrested fungal growth before colonies initiated secondary attacks. With Mla3, mesophyll HR preceded that in epidermal cells whose initial survival supported secondary infections. With MILa, mesophyll survived and not all attacked epidermal cells died immediately, allowing colony growth and secondary infection until arrested, lsolines with Mlal, Mla3, or MILa genes inoculated with B. graminis f. sp. hordei ranging from 1 to 100 conidia mm² showed abnormally high g1 during dark periods whose timing and extent correlated with those of each HR. Each isoline showed increased dark g1 with the nonpathogen B. graminis f. sp. avenae which caused a single epidermal cell HR. Guard cell autofluorescence was seen only after drying of epidermal strips and closure of stomata suggesting that locked open stomata were viable. The data link stomatal lock-up to HR associated cell death and has implications for strategies for selecting disease resistant genotypes. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
Full Text Finder