Download or read book Fine structure acid mist treated Sitka spruce needles written by A. Wulff and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pathological and Regenerative Plant Anatomy written by Siegfried Fink and published by Gebruder Borntraeger Verlagsbuchhandlung. This book was released on 1999 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Healthy plants are not only the aim of all gardeners, farmers, and foresters, but they also are the principal study object of plant biologists. However, it is only the stressed, injured, or diseased plant which exhibits the full range of possible structural and functional responses to challenges by harmful abiotic or biotic stimuli, consisting of highly variable forms of degeneration, adaptation, defense, or regeneration. In medicine, books on diseases are obviously much more numerous than books on healthy humans; in botany, by comparison, books on injured and diseased plants are much rarer. The present text tries to comprehend the current status of our knowledge of the possible structural changes in plants suffering from, e.g., genetic disorders, mechanical stresses, injuries, frost, heat, drought and mineral deficiencies and excesses, air pollutants, viruses, bacteria, fungi, parasitic vascular plants, nematodes, or insects. Almost 75 years after the last edition of Ernst Küster's book on Pathological Plant Anatomy (Pathologische Pflanzenanatomie), this is the first modern compilation of pathological plant anatomy. With more than 7000 references it covers the most relevant literature, including many older publications which have nearly fallen into oblivion, though they contain valuable and still unsurpassed information.
Download or read book Pathological and Regenerative Plant Anatomy written by Dr. Siegfried Fink and published by . This book was released on 1999 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of acid mist on needles from mature Sitka spruce grafts Part II Influence of developmental stage age and needle morphology on visible damage written by I D (Ian) Leith and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mature grafts of five Sitka spruce (Picea sitchensis (Bong.) Carr.) clones were exposed to simulated acid mist comprising an equimolar mixture of H2SO4 and NH4NO3 (1.6 and 0.01 mol m(-3)) at pH 2.5 and 5.0. Mist was applied to potted plants growing in open-top chambers on consecutive days, four times a week, at a precipitation equivalent of 1 mm per day. The total exposure to polluted mist was equivalent to three times that measured at an upland forest in SE Scotland. The aim of the experiment was to characterize the response of juvenile foliage produced by physiologically mature grafts (on seedling root stock) and compare it with the behaviour of juvenile foliage on seedlings. Development of visible foliar damage was followed through the growing season. Measurements of needle length, diameter, weight, surface area, surface wax weight and wettability were made on current year needles to determine whether particular foliar characteristics increased susceptibility to injury. Significant amounts ( > 10%) of visible needle damage was observed on only one of the five clones. Damage was most severe on the clone with the most horizontal branch and needle habit, but over the five clones there was no relationship between angle of branch display and damage. Likewise no combination of needle characteristics (length, width, area, amount of wax) was indicative of potential susceptibility. A comparison with previous acid misting experiments using seedlings suggests that juvenile foliage on physiologically mature trees is equally susceptible to visible injury as juvenile seedling foliage. Date of budburst differed among clones, and in this experiment exerted the over-riding influence on development of injury symptoms. Foliage exposed to a combination of strong acidity and high sulphate concentrations over the few weeks immediately following budburst suffered most visible injury. The absence of significant amounts of visible damage in UK forests probably reflects the general low su.
Download or read book Bioindication of Stress in Forest Trees and Forest Ecosystems written by Hojka Kraigher and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Agricultural Index written by and published by . This book was released on 1995 with total page 3036 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Institute of Terrestrial Ecology written by Institute of Terrestrial Ecology, Huntington (GB) and published by . This book was released on 1996 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Plant Reviews Biology of the Plant Cuticle written by Markus Riederer and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual Plant Reviews, Volume 23 A much clearer picture is now emerging of the fine structure of the plant cuticle and its surface, the composition of cuticular waxes and the biosynthetic pathways leading to them. Studies assessing the impact of UV radiation on plant life have emphasized the role of the cuticle and underlying epidermis as optical filters for solar radiation. The field concerned with the diffusive transport of lipophilic organic non-electrolytes across the plant cuticle has reached a state of maturity. A new paradigm has recently been proposed for the diffusion of polar compounds and water across the cuticle. In the context of plant ecophysiology, cuticular transpiration can now be placed in the perspective of whole-leaf water relations. New and unexpected roles have been assigned to the cuticle in plant development and pollen-stigma interactions. Finally, much progress has been made in understanding the cuticle as a specific and extraordinary substrate for the interactions of the plant with microorganisms, fungi and insects. This volume details the major developments of recent years in this important interdisciplinary area. It is directed at researchers and professionals in plant biochemistry, plant physiology, plant ecology, phytopathology and environmental microbiology, in both the academic and industrial sectors.
Download or read book Acid Rain Abstracts Annual 1990 written by and published by . This book was released on 1991-04 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Open top chamber and field exposure of Sitka spruce to simulated acid mist written by L J (Lucy) Sheppard and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sitka spruce seedlings gl own in pots of compost in open-top chambers (OTCs) or outside, in an agricultural loam soil, in different years, were treated with pH 2.5 acid mist comprising an equimolar solution, of H2SO4 and NH4NO3 at 1.6 mol m(-3). The effects of rain, and frequency of acid mist applications on visible injury, nutrition and frost hardiness were evaluated in the OTC experiment. Similar evaluations were undertaken in the field where application frequency was dependent on wind-speed, rain and direct sunlight. Rain washing significantly ameliorated the effect of acid mist on frost hardiness in OTCs. In the field experiment there was no effect of acid mist treatment. Increasing the frequency of misting in OTCs for the same exposure exacerbated the detrimental effects of acid mist, causing both visible damage and further increasing the sensitivity of the acid treated trees to freezing temperatures. The results show that the treatment environment can both ameliorate and exacerbate treatment effects.
Download or read book INIS Atomindex written by and published by . This book was released on 1995 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early effects of acid mist on Sitka spruce planted on acid peat written by L J (Lucy) Sheppard and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten year old Sitka spruce [Picea sitchensis (BONG.) CARR.], growing in a commercial plantation, on a drained, acid peat were sprayed with simulated mist providing a 'no spray', N alone, S alone and a combination of N, S and acidity at pH 5 and 2.5, (single and double dose) treatments. Approximately twice weekly from May (budburst) to December, six treatments (equivalent to 2 mm precipitation) Na2SO4, NH4NO3, H2SO4 + NH4NO3 at pH 2.5 (single and double dose), and pH 5 and an unsprayed control were applied, to four replicate chambers of 10 trees. The treatment 'chambers' comprised a framework of poles, supporting 2 full cone sprayers per tree mounted within 0.5 m of the tops of the trees, without wall structures. This paper reports some sensitive indicators of treatment effects, stemwood growth, foliar chemistry and frost hardiness, together with measurements of soil chemistry after one and two treatment seasons. In the first year of treatment no significant effects on growth were found although stem basal area increment increased by approximately 50%. After one year of treatment there was a tendency for shoots receiving N/acidity to be least frost hardy when tested in December (by approximately 4 degrees C). Foliar S, N and Mg concentrations were significantly increased in response to S and N additions. In the second year, no biologically significant effects were found. Two years of treatment with N and S, both with and without acidity, still failed to affect growth measured as relative stem basal area increment. However, relative increments in stem volume indicated a significant positive response to the acidified S + N treatments after two treatment seasons. Initial findings are discussed in relation to results from similar studies in controlled environments and the field. Early indications are that the sail nutrient supply is dominating the tree response to N, S and acid treatment. And that acidified S and N inputs are not damaging the trees but have stimulated gro.
Download or read book How reproducible are the reactions of stress indicators for Sitka spruce treated with acid mist written by L J (Lucy) Sheppard and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of previously published experiments based on open-top chambers and field exposure systems with seedlings, mature grafts and physiologically mature trees (
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1997 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1972 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
