Nutrition

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By R. Merckx, E. Smolders, K. Vlassak (auth.), M. L. van Beusichem (eds.)

Exactly 35 years after the 1st Colloquium used to be held, the 11th foreign Plant food Colloquium came about from 30 July to four August 1989 in Wageningen, The Netherlands. even if awesome growth has been made up to now a long time in our figuring out of the mechanisms of uptake, distribution and assimilation of nutrition with regards to crop yield and caliber, there are nonetheless major gaps in our perception into many basic features of plant mineral foodstuff and comparable metabolic procedures. regardless of better wisdom of nutrient requisites of vegetation and more advantageous fertilizer program ideas, the area inhabitants continues to be stressed with a huge scarcity of plant items for nutrients, trees, gas, preserve, and different reasons. the most problem dealing with the plant meals learn group is to at the least alleviate the expanding world-wide want for employing medical wisdom to sensible difficulties in agriculture, horticulture, and forestry. it really is as a result felt via many scientists that the Plant nutrients Colloquia, that are meant to compile scientists and to combine wisdom and methods got in plant body structure, biochemis­ attempt, soil technology, agronomy and similar disciplines, have certainly made an important contribution to the development of our wisdom and knowing during this important and interdisciplinary box of agrobiology. approximately 260 scientists from forty international locations attended the Colloquium in Wageningen.

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Extra info for Plant Nutrition — Physiology and Applications: Proceedings of the Eleventh International Plant Nutrition Colloquium, 30 July–4 August 1989, Wageningen, The Netherlands

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Exp. Bot. 37, 1599-1610. Andrade H and Anderson I C 1986 Physiological effects of the nitrogen form on corn root tips: A 31p nuclear magnetic resonance study. Crop Sci. 26, 293-296. Barker A V, Maynard D N and Lachman W H 1967 Induction of tomato stem and leaf lesions and potassium deficiency by excessive ammonium nutrition. Soil Sci. 103, 319-327. Borner H 1987 Veriinderungen im Polyamingehalt wiihrend Nitrogen form and concentration on ionic balance der Keimung der Sklerotien und der Apothezienentwicklung bei Sclerotinia sclerotiorum, dem Erreger der WeiBstengeligkeit des Rapses.

Nitrate was extracted from dried plant material by boiling in water for 1 min, and was analyzed colorimetrically (Lichfield, 1967). from 300 to 800 mM and from 50 to 250 mM, respectively. Figure 1 shows the relationship between internal nitrate concentrations and [Nt for shoots from the first experiment. At low [Nt, no nitrate was detectable but above a particular, tissuespecific value of [NL nitrate accumulated proportionately with changes in [Nt. Similar relationships were observed for roots and leaf 4 but the threshold [Nl j for nitrate accumulation were different.

Exp. Bot. 29, 435-451. Goldsmith M H, Cataldo D A, Karn J, Brennemann T and Trip P 1974 The rapid non-polar transport of auxin in the phloem of intact coleus plants. Plant a 116, 301-317. Hackett C 1968 A study of the root system of barley. I. Effects of nutrition on two varieties. New Phytol. 67, 287-299. Martin H V and Elliot M C 1984 Ontogenetic changes in the transport of indol-3yl-acetic acid into maize roots from the shoots and caryopsis. Plant Physiol. 74, 971-974. Martin H V, Elliot M C, Wangermann E and Pilet P E 1978 Auxin gradient along the root of the maize seedling.

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