664 PB 104 AGROBACTERIUM INFECTION OF WHITE ASH (FRAXINUS AMERICANA L.)
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چکیده
منابع مشابه
Translocation of Organic Substances in Trees. V. Experimental Double Interruption of Phloem in White Ash (Fraxinus americana L.).
The student of phloem quickly learns that he is dealing with a tissue that functions normally only in the intact plant. Injury, such as an incision into the phloem, causes a disturbance that extends over great lengths up and down from the point of injury. The disturbance consists of several phases. First of all, there is an immediate and far-reaching turgor release which results in an accelerat...
متن کاملSystematic variation in xylem hydraulic capacity within the crown of white ash (Fraxinus americana).
A 7-m tall white ash tree (Fraxinus americana Marsh.) was dissected, and hydraulic parameters of the xylem were determined by inducing a steady-state flow of water through the stem segments and monitoring volume and velocity flow rates. Leaf-specific conductivity (LSC) was highest in the main stem and lowest in some of the leaf-bearing lateral shoots. The LSC was higher in the main stem than in...
متن کاملWhite ash (Fraxinus americana) decline and mortality: The role of site nutrition and stress history
0378-1127/$ see front matter Published by Elsevier http://dx.doi.org/10.1016/j.foreco.2012.08.049 ⇑ Corresponding author. Tel.: +1 814 563 1040; fax E-mail address: [email protected] (A.A. Royo). Over the past century, white ash (Fraxinus americana) populations throughout its range have deteriorated as a result of declining tree health and increased mortality rates. Although co-occurring factors ...
متن کاملTranslocation of Organic Substances in Trees. III. The Removal of Sugars from the Sieve Tubes in the White Ash (Fraxinus Americana L.).
It has been shown by various investigators that the substances in the sieve tubes are qualitatively the same throughout the plant. This, together with a number of physiological observations, seems to suggest that substances move through the sieve tubes without their being metabolized (2, 8, 23). There is good evidence, however, that the movement over the short distance from the leaf parenchyma ...
متن کاملLC-DAD/ESI-MS/MS study of phenolic compounds in ash (Fraxinus excelsior L. and F. americana L.) heartwood. Effect of toasting intensity at cooperage.
The phenolic composition of heartwood extracts from Fraxinus excelsior L. and F. americana L., both before and after toasting in cooperage, was studied using LC-DAD/ESI-MS/MS. Low-molecular weight (LMW) phenolic compounds, secoiridoids, phenylethanoid glycosides, dilignols and oligolignols compounds were detected, and 48 were identified, or tentatively characterized, on the basis of their reten...
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ژورنال
عنوان ژورنال: HortScience
سال: 1994
ISSN: 0018-5345,2327-9834
DOI: 10.21273/hortsci.29.5.528a