A Relationship Between the Phenolic Compounds and the Resistance to Sclerotinia (Monilinia) Laxa (Aderh Et Ruhl.) in Some Apricot Varieties

Mısırlı, Adalet; Gülcan, R.; Tanrisever, A.

doi:10.17660/actahortic.1995.384.31

Cited by 6 publications

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“…As well, phenolic compounds play a major role in the resistance to plant pathogens. These compounds exist in many different plant parts: root, shoot, flower, leaf buds, woody tissues, leaf, phloem, pollen, and stylus (Misirli et al 1995). Moreover, chlorogenic acid is induced in response to wounding and can act as defense compound (Dixon and Paiva 1995).…”

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“…Many researchers have conducted studies on the seasonal changes of carbohydrates in leaves of Rosaceae trees (Loescher et al 1982;Bieleski and Redgwell 1985;Merlo and Passera 1991;Moing et al 1997;Wang et al 1999;Lo Bianco et al 2000;Deguchi et al 2002;Veberic et al 2003;Sircelj et al 2005) while seasonal patterns of leaf phenolics have been investigated less (Mayr et al 1995;Misirli et al 1995;Treutter 2001;Usenik et al 2004). If we focus on the carbohydrate and phenolic dynamics of leaves of European pear (Pyrus communis L.) during the growing season, there exists even less information (Gunen et al 2005), and data are mostly restricted to ripe fruits.…”

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Changes in sugars and phenolics concentrations of Williams pear leaves during the growing season

Colarič

Štampar²,

Hudina³

2006

Can. J. Plant Sci.

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Colaric, M., Stampar, F. and Hudina, M. 2006. Changes in sugars and phenolics concentrations of Williams pear leaves during the growing season. Can. J. Plant Sci. 86: 1203-1208. Leaves of Williams pear were collected during the growing season from May to October and the contents of sugars and phenolic compounds were analyzed by high-performance liquid chromatography method. Sorbitol was the major sugar (up to 83.8 g kg -1 DW), followed by sucrose (up to 22.1 g kg -1 DW). Concentrations of glucose and fructose were as high as 12.9 and 9.0 g kg -1 DW, respectively. Leaves contained up to 29 471.9 mg kg -1 DW of chlorogenic acid, followed in concentration by rutin (up to 6789.2 mg kg -1 DW), epicatechin (up to 7378.0 mg kg -1 DW), catechin (up to 3846.5 mg kg -1 DW), vanillic acid (up to 1832.1 mg kg -1 DW), syringic acid (up to 1123.5 mg kg -1 DW), caffeic acid (up to 122.5 mg kg -1 DW) and sinapic acid (up to 94.1 mg kg -1 DW). The significant differences in concentration of sorbitol, sucrose, glucose, and in all analyzed phenolics were observed during the growing season (six sampling dates). The lowest concentrations in the leaf were found at the beginning of the growing season in May and June. The highest contents of sugars were in October, with the exception of sorbitol. During the growing season, total phenolic content first increased, then declined. Chlorogenic acid, rutin and caffeic acid contents increased until July, vanillic acid and sinapic acid until August, and catechin, epicatechin and syringic acid until September. However, total phenolic content dropped by 50% from September to October.

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Changes in sugars and phenolics concentrations of Williams pear leaves during the growing season

Colarič

Štampar²,

Hudina³

2006

Can. J. Plant Sci.

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“…Phenolics are functional compounds in plants, acting as a stress-defensive mechanism and attracting or defending against herbivores and plant pathogens (Treutter, 2005). Phenolics are widely distributed in plants, including in the roots, shoots, woody tissues, leaves, phloem, owers and leaf buds, pollen and styles (Misirli et al, 1995).…”

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Forests Phenolic Compounds Instigate Cloud Precipitation

Mezour¹

2020

Preprint

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BackgroundThe wind shakes trees fluttering their leaves generating heat within. Mechanosensing is a crucial process in regulating trees’ growth and development. Mechanical stresses generate internal and external signals in trees. The aim is to establish the myriad of communication signals between forests, their ecology, wind and the clouds. ResultsAs result of leaves’ flutter trees open their stomata releasing phenolic compounds into the atmosphere. These aerosols linger in the atmosphere till they collide with the incoming clouds, condensing their particles causing precipitation.ConclusionWhile the relationship between deforestation and global warming has already been established by many scientists, the communication between trees, wind and cloud is dynamic, which without the three together earth’s climate will persist towards desolation. Forests endure wind forces, causing their leaves to flutter, which prompt them to release phenolic compounds forming lakes of aerosols above the forests, instigating cloud precipitation.

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