Root excretions in relation to the rhizosphere effect. IV. Influence of plant species, age of plant, light, temperature, and calcium nutrition on exudation.
Root excretions in relation to the rhizosphere effect. IV. Influence of plant species, age of plant, light, temperature, and calcium nutrition on exudation.
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DOI：
10.1007/bf01394753
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发表时间：
1959-01-01
期刊：
影响因子：
4.9
通讯作者：
Rovira, A. D.
中科院分区：
文献类型：
--
作者：
Rovira, A. D.
第四部分比较了在营养液中生长4周的幼苗番茄和其他植物的根中氨基酸的分泌。前两周的渗出量大于后两周。在番茄分泌物中，减少光照降低了天冬氨酸、谷氨酸、苯丙氨酸和亮氨酸的含量，增加了丝氨酸和天冬酰胺的含量。当温度从16-30°逐渐升高到32-41 ° C时，总渗出量和谷氨酸含量增加。通气和钙水平的影响不大，但微生物的存在和附近的番茄根减少游离氨基酸在第二个星期。CSIRO阿德莱德。[For第一至第三部分见H. A.，二十七日：2436.这是一个只有标题的记录，没有摘要。番茄和蝴蝶兰根分泌的氨基酸量超过了三叶草根分泌的氨基酸量。渗出是在第一个比在第二个2周的增长。三叶草分泌物中丝氨酸、谷氨酸和α-丙氨酸的含量在低光强下较小;天冬氨酸、谷氨酸、苯丙氨酸和亮氨酸随光照强度的降低而降低，但丝氨酸和天冬酰胺则随光照强度的降低而升高。高温增加了番茄和三叶草根系分泌的氨基酸量。钙和通气对渗出的影响不大。微生物降低了番茄根际土壤溶液中游离氨基酸的含量，但对三叶草影响不大。除非植物生长在相同的光照、温度和土壤条件下，并在相似的生长阶段收获，否则必须谨慎解释比较。
Part IV compares the exudation of amino acids from the roots of seedling tomato and other plants grown for 4 weeks in nutrient solutions. Exudation was greater during the first than during the second fortnight. In the tomato exudate decreasing the light reduced the amounts of aspartic acid, glutamic acid, phenylalanine and leucine, and increased serine and asparagine. The total exudation and the glutamic acid fraction were increased by raising the temperature progressively from a diurnal range of 16-30° to one of 32-41 ° C. Aeration and Ca level had little effect, but the-presence of micro-organisms on and near the tomato roots reduced the free amino acids during; the second fortnight.-C.S.I.R.O., Adelaide. [For parts I-III see H.A., 27: 2436.This is a title only record which contains no abstract.The amount of amino acids exuded by roots of tomato and phalaris exceeded that exuded by clover roots. Exudation was greater during the first than in the second 2 weeks of growth. Amounts of serine, glutamic acid and alpha-alanine in the exudate of clover were small at low light intensities; aspartic acid, glutamic acid, phenylalanine and leucine decreased with decreasing light, but serine and asparagine increased. High temperatures increased the amounts of amino acids exuded by tomato and clover roots. Ca and aeration had little effect on exudation. Micro-organisms reduced the free amino acids in the soil solution of the rhizosphere around tomato, but there was little effect on clover. Unless plants are grown under identical conditions of light, temperature and soil and harvested at similar stages of growth, comparisons must be interpreted with caution.