Defense response of pine stem phloem to wounding and treatment with mycelial extracts from Ceratocystis laricicola

Polyakova, G. G.; Stasova, V. V.; Pashenova, N. V.

doi:10.1134/s1021443711050177

Cited by 2 publications

(4 citation statements)

References 13 publications

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“…Our preliminary investigations show that the phloem defense response evolves after inoculation of mycelium extract as well as live mycelium [8][9][10]24]. A phloem lesion was formed.…”

Section: The Stem Phloem Defense Response (Stem Lesion Test)mentioning

confidence: 93%

“…We applied the stem lesion test developed in our laboratory [8][9][10]. This test is based on the well-known method of stem inoculation with live mycelium of an ophiostomatoid fungus and induction of conifer plant defense response [23][24][25][26].…”

Section: The Stem Phloem Defense Response (Stem Lesion Test)mentioning

confidence: 99%

“…The current study elaborates a method for assessing environmental toxicity using pine stands as bioindicators. Our previous investigations [8][9][10] show the promise of a stem lesion test for assessing the impact of environmental factors on the vigor state of conifer trees. The stem lesion test applies characteristics of the stem phloem defense response after inoculation with the mycelial extract of ophiostomatoid fungi, as well as live mycelium.…”

Section: Introductionmentioning

confidence: 99%

“…The stem lesion test applies characteristics of the stem phloem defense response after inoculation with the mycelial extract of ophiostomatoid fungi, as well as live mycelium. As for pine trees, the use of the mycelial extract of the ophiostomatoid fungus Ceratocystis laricicola is promising [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Pine Stands as Bioindicators: Justification for Air Toxicity Monitoring in an Industrial Metropolis

et al. 2020

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Five permanent sample plots (SPs; 200–250 trees per plot) were established in middle-aged high-grade suburban pine stands near the industrial city of Krasnoyarsk, Siberia, Russia. Needle damage, inventory parameters of the stands, and the defense response of the stem phloem were evaluated annually for the years 2002–2019 and attributed to acute or chronic toxic exposures (creeping fire or industrial pollutants, respectively). The results form a basis for using trees as bioindicators. A newly elaborated stem lesion test was formed from a hypothesis on the upward sugar transport for the regeneration of an injured crown, based on Eschrich’s model of bidirectional sugar transport in the phloem. The formation of a phloem lesion was induced by inoculation of the stem with a mycelial extract of the ophiostomatoid fungus Ceratocystis laricicola. The lesion length and its shift relative to the inoculation hole were measured. An increase in the length of needles at early stages of stand weakening by pollutants was found to correspond to the hormesis model (Selye’s adaptation syndrome). A possibility of assessing the chronology of pollutant toxicity and the duration of the recovery period after creeping fire was shown.

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“…Our preliminary investigations show that the phloem defense response evolves after inoculation of mycelium extract as well as live mycelium [8][9][10]24]. A phloem lesion was formed.…”

Section: The Stem Phloem Defense Response (Stem Lesion Test)mentioning

confidence: 93%