Histochemistry of Corsican Pine Needles Infected by Lophodermella sulcigena (Rostr.) v.Höhn.

Williamson, B.; Mitchell, C. P.; Millar, C. S.

doi:10.1093/oxfordjournals.aob.a085129

Cited by 21 publications

(25 citation statements)

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“…Similar types of reaction have been observed in pine needles affected by atmospheric pollutants (SoLBERG et al 1955;STEWART et al 1973;MILLER and EVANS 1974). The production of the primary matrix was, however, thought by WILLIAMSON et al (1976) to be a host response specific infection by L. sulcigena. The production of a secondary matrix and tanning of tissues of the stele at the stationary interface appear to be reactions specific to secondary infection by H. acicola.…”

Section: Needle Breakage and Fallsupporting

confidence: 59%

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Hendersonia acicola on pine needles infected by Lophodermella sulcigena

1976

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Hendersonia acicola normally infects only needles already infected, in July-August of their first year, by Lopbodermella sulcigena. Secondary infeetion, by H. aeieola, oecur.s at the base of the L. suleigena lesion either in August-October of the first year (early secondary infection) or after fruiting of L. suleigena in June-July of the second year (late secondary infection). Early secondary infeetion prevents fruiting of L. sulcigena. An intercellular matrix forms at the base of the L. suleigena lesion in response to both early and late secondary infeetion and rapid tissue disorganisation and disintegration ensues. Secondary infection decreases with increase in height up the tree and often results in needle breakage.

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Section: Needle Breakage and Fallsupporting

confidence: 59%

“…Proximal to the interface hypertrophy of the phloem and transfusion parenchyma occurred (see WILLIAMSON et al 1976). The xylem became tanned.…”

Section: Colonization and Matrix Formationmentioning

confidence: 99%

Hendersonia acicola on pine needles infected by Lophodermella sulcigena

1976

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“…Le fait de n'avoir observC aucun sympt6me de rkaction de l'aiguille i L. piceae confirme une Ccologie strictement saprophyte. Les Hypodermataceae parasites (Lophodermella spp., par exemple) induisent parfois des hyperplasies du parenchyme ou des cellules stcrCtrices des canaux resiniferes (Williamson et al 1976;Mitchell, Millar et Williamson 1978), phCnomknes ici totalement absents.…”

Section: Discussionunclassified

Microscopie de la mycoflore des aiguilles de sapin (Abies alba). II. Lophodermium piceae

Gourbière¹,

Pepin²,

Bernillon³

1986

Can. J. Bot.

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Microscopie de la mycoflore des aiguilles de sapin (Abies alba). 11. Lophodermium piceae FRANGOIS G O U R B I~R E , R~G I S P~P I N ET DOMINIQUE BERNILLON Universite' Lyon I, Laboratoire d'e'cologie vkgktale, 43, boulevard du 11 Novernbre 1918, Bcitirnent 741, F-69622 Villeurbanne Ce'dex, France R e~u le 2 janvier 1985 GOURBI~RE, F., R. PBPIN et D. BERNILLON. 1986. Microscopie de la mycoflore des aiguilles de sapin (Abies alba). 11. Lophoderrniurn piceae. Can. J. Bot 64: 102 -107. La colonisation des aiguilles d'Abies alba Mill. par le Lophoderrniurn piceae (Fckl.) Hohn. (Ascomycktes, Hypodermataceae) est CtudiCe en rnicrosc.opie photonique et Clectronique. Le mycClium interne est d'abord extracellulaire et colonise tous les tissus de I'aiguille. Ides hyphes peuvent ensuite pCnCtrer dans toutes les cellules. Le cytoplasme des cellules vivantes (parenchyme, phlokme, tissus de transfusion cellulosique) et leurs parois cellulosiques sont alors lysCs. Les hyphes pCnktrent Cgalernent i 1'intCrieur des cellules i parois Cpaisses et lignifiCes (Cpiderme, hypoderme, xylkme, trachCides et fibres du tissusde transfusion), mais sans qu'il y ait degradation importante de la paroi. Le dCveloppement des ascomes est intrakpidermique. Des zones noires, les diaphragmes, limitent les portions d'aiguilles colonis6es: leur structure est dCcrite. Lophoderrniurn piceae est un saprophyte primaire. Les aiguilles sont colonisCes pendant la sCnescence mais les ascomes ne se dCveloppent qu'aprks la chute des aiguilles. Un gramme d'aiguilles produit environ 230 ascomes. L'Ccologie de ce charnpignon est comparCe avec celle de 7hysanophora penicillioides (Roum.) Kendrick, autre colonisateur des aiguilles de sapin, et avec celle de Lophodetmiurn pinastri (Schrad.) Chev. sur les aiguilles de Pinus. GOURBI~RE, F., R. PBPIN, and D. BERNILLON. 1986. Microscopie de la mycoflore des aiguilles de sapin (Abies alba). 11. Lophoderrniurn piceae. Can. J. Bot 64: 102 -107. Colonization of Abies alba Mill. needles by Lophoderrniurn piceae (Fckl.) Hohn. (Ascomycetes, Hypodermataceae) was studied by light and electron microscopy. Internal mycelium is at first extracellular and invades all the tissues of the needle; thereafter hyphae may penetrate all cells. Cytoplasm and walls of living cells (parenchyma, phloem, cellulosic transfusion tissues) are then lysed. Hyphae also invade thick-walled and lignified cells (epidermis, hypodermis, xylem, tracheids, and fibers of transfusion tissues) without major degradation of the cell wall. Ascomatal development is intraepidermic. Colonization of the needles is limited by black areas (the diaphragms), the structure of which is described. Lophoderrniurn piceae is a primary saprophyte. Needles are colonized during senescence but ascomata appear only on fallen needles. There are about 230 ascomata per gram of needles. The ecology of this fungus is compared with that of 7hysanophora penicillioides (Roum.) Kendrick on Abies needles and with that of Lophoderrniurn pinastri (Schrad.) Chev. on Pinus needles.

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“…laricio needles infected with L. sulcigena and in P. palustris needles infected with Ploioderma hedgcockii (Dearn.) Darker (Williamson et al 1976;Jewell 1990). Williamson et al (1976) reported that prior to hypertrophy and hyperplasia of cells at the host-parasite interface in L. sulcigena-infected P. nigra ssp.…”

Section: Stationary Interfaces and Needle Sheddingmentioning

confidence: 99%

“…Darker (Williamson et al 1976;Jewell 1990). Williamson et al (1976) reported that prior to hypertrophy and hyperplasia of cells at the host-parasite interface in L. sulcigena-infected P. nigra ssp. laricio, a stationary interface is formed in response to infection.…”

Section: Stationary Interfaces and Needle Sheddingmentioning

confidence: 99%

A review of Pinaceae resistance mechanisms against needle and shoot pathogens with a focus on the Dothistroma–Pinus interaction

et al. 2015

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SummaryDothistroma needle blight (DNB), caused by Dothistroma septosporum and Dothistroma pini, is a highly damaging disease of pine. DNB was originally considered a problem on exotic Pinus radiata plantations in the Southern Hemisphere and on both exotic and native pines in parts of North America in the 1960s. Since the mid-1990s, however, DNB has increased in importance in various parts of the world, including Europe. On susceptible species, DNB causes premature needle drop, a loss of yield and, in some circumstances, mortality. In some areas, DNB is controlled by the application of copper-based fungicides and silvicultural techniques, such as thinning and pruning. In New Zealand, there has also been a long history of selection of more resistant P. radiata for use in breeding programmes. A richer understanding of the resistance mechanisms involved in the Dothistroma-Pinus interaction will play a critical role in helping the development of sustainable integrated DNB management strategies. This review therefore summarizes current knowledge of defence mechanisms involved in the defence of Pinaceae against needle and shoot pathogens and identifies research gaps. Collaborative research efforts from countries directly or indirectly affected by DNB are rapidly generating new knowledge to address these gaps.

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Histochemistry of Corsican Pine Needles Infected by Lophodermella sulcigena (Rostr.) v.Höhn.

Cited by 21 publications

References 0 publications

Hendersonia acicola on pine needles infected by Lophodermella sulcigena

Hendersonia acicola on pine needles infected by Lophodermella sulcigena

Microscopie de la mycoflore des aiguilles de sapin (Abies alba). II. Lophodermium piceae

A review of Pinaceae resistance mechanisms against needle and shoot pathogens with a focus on the Dothistroma–Pinus interaction

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