Salicylic Acid Content in Cucumber Plants Infected With Pseudomonas Lachrymans and Tobacco Necrosis Virus

Mölders, W.; Meuwly, Ph.; Summermatter, Kathrin; Métraux, Jean‐Pierre

doi:10.17660/actahortic.1994.381.47

Cited by 9 publications

(5 citation statements)

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“…We inoculated C. sativus cv. Wisconsin SMR58 plants at the two-leaf stage in their first true leaf with the causal agent of angular leaf spot, Psl ( Słomnicka et al , 2018 ), a pathogen that elicits systemic defense responses in cucumber ( Mölders et al , 1994 ). SA and its β-glucoside SAG accumulated significantly in the Psl -inoculated first leaves at 3 dpi and 5 dpi, whereas the systemic accumulation of SA in the distal leaves was modest, and that of SAG was not significant ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Inducible biosynthesis and immune function of the systemic acquired resistance inducer N-hydroxypipecolic acid in monocotyledonous and dicotyledonous plants

Schnake

Hartmann

Schreiber

et al. 2020

Journal of Experimental Botany

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Abstract Recent work has provided evidence for the occurrence of Nhydroxypipecolic acid (NHP) in Arabidopsis thaliana, characterized its pathogen-inducible biosynthesis by a three-step metabolic sequence from L-Lys, and established a central role for NHP in the regulation of systemic acquired resistance (SAR). In the present study, we show that NHP is biosynthesized in a series of other plant species in response to microbial attack, generally alongside with its direct metabolic precursor pipecolic acid and the phenolic immune signal salicylic acid. For example, NHP accumulates locally in inoculated and systemically in distant leaves of cucumber in response to Pseudomonas syringae attack, in Pseudomonas-challenged tobacco and soybean leaves, in tomato inoculated with the oomycete Phytophthora infestans, in leaves of the monocot Brachypodium distachyon infected with bacterial (Xanthomonas translucens) and fungal (Magnaporthe oryzae) pathogens, and in M. oryzae-inoculated barley. Notably, resistance assays indicate that NHP acts as a potent inducer of acquired resistance to bacterial and fungal infection in distinct mono- and dicotyledonous species. Pronounced systemic accumulation of NHP in leaf phloem sap of locally-inoculated cucumber supports a function for NHP as a phloem-mobile immune signal. Our study thus generalizes the existence and function of an NHP resistance pathway in plant SAR.

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Section: Resultsmentioning

confidence: 99%

Inducible biosynthesis and immune function of the systemic acquired resistance inducer N-hydroxypipecolic acid in monocotyledonous and dicotyledonous plants

Schnake

Hartmann

Schreiber

et al. 2020

Journal of Experimental Botany

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“…In comparison to local tissues, the distal tissues of SAR-induced plants have been shown to accumulate a broad range of SA ranging from as low as 10 ng/ g FW to ∼2.6 μg/g FW ( Table 1 ; Rasmussen et al, 1991 ; Yalpani et al, 1991 ; Meuwly and Métraux, 1993 ; Molders et al, 1994 ; Vernooij et al, 1994 ; Lawton et al, 1995 ; Shulaev et al, 1995 ; Cameron et al, 1999 ; Kiefer and Slusarenko, 2003 ; Mishina and Zeier, 2006 ; Attaran et al, 2009 ; Liu et al, 2010 , 2011 ; Xia et al, 2010 ; Chanda et al, 2011 ; Gao et al, 2014 ). The inability to accumulate SA in distal tissues has also been suggested to contribute to impaired SAR in ald1 ( agd2 -Like Defense response protein 1) and fmo1 (Flavin Monooxygenase 1) mutants, both of which accumulate normal SA in the local tissue ( Song et al, 2004a , b ; Mishina and Zeier, 2006 ).…”

Section: Sa Biosysnthesis and Sarmentioning

confidence: 99%

Signal regulators of systemic acquired resistance

et al. 2015

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Salicylic acid (SA) is an important phytohormone that plays a vital role in a number of physiological responses, including plant defense. The last two decades have witnessed a number of breakthroughs related to biosynthesis, transport, perception and signaling mediated by SA. These findings demonstrate that SA plays a crictical role in both local and systemic defense responses. Systemic acquired resistance (SAR) is one such SA-dependent response. SAR is a long distance signaling mechanism that provides broad spectrum and long-lasting resistance to secondary infections throughout the plant. This unique feature makes SAR a highly desirable trait in crop production. This review summarizes the recent advances in the role of SA in SAR and discusses its relationship to other SAR inducers.

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“…On the other hand, SAR depends on the presence of a minimal concentration of endogenous SA as demonstrated by the loss of SAR in transgenic tobacco overexpressing salicylate hydroxylase (Vernooij et al, 1994). Generally, both in tobacco and in cucumber, infection leads to only small systemic increases in endogenous SA levels (Yalpani et al, 1991;Meuwly and Métraux, 1993;Molders et al, 1994), indicating that these plants are likely to be responsive to small changes in endogenous SA. In cucumber the increase in SA resulting from translocation might therefore contribute to the induction of SAR.…”

Section: Transport Of Sa After Lnjection Of [14c]bamentioning

confidence: 99%

Transport of Salicylic Acid in Tobacco Necrosis Virus-Infected Cucumber Plants

1996

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The transport of salicylic acid (SA) was studied in cucumber (Cucumis safivus 1.) using ''C-labeled benzoic acid that was injected in the cotyledons at the time of inoculation. Primary inoculation with tobacco necrosis virus (TNV) on the cotyledons led to an induction of systemic resistance of the first primary leaf above the cotyledon against Collefotrichum lagenarium as early as 3 d after inoculation.[14C]SA was detected in the phloem or in the first leaf 2 d after TNV inoculation, whereas ['4Clbenzoic acid was not detected in the phloem during the first 3 d after TNV inoculation of the cotyledons, indicating phloem transport of [14C]SA from cotyledon. In leaf 1, the specific activity of [l4C1SA decreased between 1.7 and 8.6 times compared with the cotyledons, indicating that, in addition to transport, leaf 1 also produced more SA. The amount of SA transported after TNV infection of the cotyledon was 9 to 160 times higher than in uninfected control plants. Thus, SA can be transported to leaf 1 before the development of systemic acquired resistance, and SA accumulation in leaf 1 results both from transport from the cotyledon and from synthesis in leaf 1.

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Salicylic Acid Content in Cucumber Plants Infected With Pseudomonas Lachrymans and Tobacco Necrosis Virus

Cited by 9 publications

References 0 publications

Inducible biosynthesis and immune function of the systemic acquired resistance inducer N-hydroxypipecolic acid in monocotyledonous and dicotyledonous plants

Inducible biosynthesis and immune function of the systemic acquired resistance inducer N-hydroxypipecolic acid in monocotyledonous and dicotyledonous plants

Signal regulators of systemic acquired resistance

Transport of Salicylic Acid in Tobacco Necrosis Virus-Infected Cucumber Plants

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