Über die Beeinflussung der Wurzelbehaarung von Roggenkeimpflanzen durch verschiedene Außenfaktoren

Bergmann, Werner

doi:10.1002/jpln.19580800304

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…may substancially enlarge the root surface and therefore play an important role in nutrient uptake (Itoh and Barber, 1983). Since physiological and morphological characters of plant roots are in turn influenced by soil parameters such as nutrient availability (Foehse and Jungk, 1983), pH (Bergmann, 1958) or water content (Mackay and Barber, 1985) the depletion zones develop as the result of the mutual interactions between soil and plant.…”

Section: Introductionmentioning

confidence: 99%

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

1987

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The dynamics of the development and replenishment of P-depletion zones around the primary root of maize (Zea mays L. cv 'Garbo') was studied during a vegetation period (80 days) under greenhouse conditions in a loamy sand of low P-availability.A recently described freeze-cutting technique was used to determine radial diffusion of labelled phosphate to the primary root. The development of the depletion zone was biphasic. In the initial phase after two days of growth of the primary root in a soil layer labelled with 33p a minimum of isotopically exchangeable P (EP) was observed which had decreased to about 30% of its original amount at the root surface. At that time the corresponding P-concentration in the soil solution was calculated to be as low as 5 • 10 -7 M. The depletion zone had already spread 0.4 mm from the root surface. During the second phase, between the 10th and 20th day of plant growth the concentration of EP at the root surface increased slowly but did not change markedly. However, the depletion zone continued to spread and after the 20th day of growth reached its maximal diameter (1.07 mm from the root surface) but remained completely within the root hair cyclinder; the single root hairs never exceeded 1.14mm in length. The biphasic growth of the depletion zone was probably caused by proton extrusion of the root tip. Acidification of the soil solution from pH 5.8 to about 3.9 results in an about 3-fold rise of the concentration of desorbed phosphate and might also have activated acidophilic P-translocators of the root during the initial phase. Anion over cation uptake normally prevailing during the later stage of root development might resulted in a rise of the soil pH within the root hair zone. Consequently P-availability, as well as P-uptake capacity declined, but P-uptake by the seminal root still continued until the 20th day. Subsequently, the P-concentration within the depletion zone increased again while simultaneously its extent was reduced until it was almost completely replenished after 60 days indicating a loss of P-uptake capacity of the primary root.Within the root tissue 33p was accumulated to about twice the concentration of that in the undepleted soils. This accumulation corresponded to periods of high uptake due to the development of root laterals. In the root cortex a high P-content was observed during the first 30 days of growth. At the onset of the reproductive stage of the plant the P-content of the shoot and especially in the developing seeds rose considerably at the cost of phosphate stored in the root cortex. The accumulation of 33p in the root tissue indicated that nutrient gain was mainly achieved during the early stages of plant development and that P was temporarily stored to some extent within the root system.Abbreviations. EP = isotopically exchangeable phosphate; P = inorganic phosphate; SE = standard error of estimate; 247 248 Kraus, Fusseder and Beck

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Section: Introductionmentioning

confidence: 99%

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

1987

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“…Formation and characteristics the root hairs such as volume, length, longevity depends on n=both genetic and environmental factors. The environmental factors that affect the formation of root hairs are soil pH and soil calcium concentration (Ewens and Leigh, 1985), the presence of bicarbonates (Bergmann et al, 1958), length and number is regulated by mineral nutrients, particularly Nitrate and phosphate. When the concentration of nitrate is low, high number of root hairs with long length are formed (Fohse and Jungk, 1983) Phosphate in the soil has lower effective diffusion coefficient than potassium, hence the acquisition of Potassium is assumed to depend on root hairs.…”

Section: Relationship Between Nutrients and Root Hair Formationmentioning

confidence: 99%

Chickpea Plant It’s Molecular Regulation of Root Hairs: A Review

Kaur¹,

Sofi²,

Saini³

et al. 2021

PLANT ARCHIVES

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Chickpea is one of the most important leguminous, food crop. Conventional breeding has resulted in several important improvements in this crop. Chickpea is an important part of human nutrition as it has good nutritional value. This results suggest that a collective effect of superior morphological and physiological root traits confers better nutrition of chickpea genotypes in low nutrient soil conservation. We investigated the morphological (root length, root hairs) and physiological (root exudation of protons and phosphatase enzymes) root traits and related them to uptake of twelve nutrients by ten selected breeding lines of chickpea. Reactive oxygen species (ROS) acts as a signaling molecule that plays a very crucial role in maintaining normal plant growth. Salinity causes loss of chickpea crop in various regions and salt accumulates Na+ and Cl-ions in the tissues of plant that causes detrimental effects to chickpea. The increase of ROS can be decreased by the addition of Nod Factors (NFs) in the root hair cells. The level of calcium ions increases that lead to increase in the ROS species accumulated at the top of root hair cells.

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“…Mulder and van Veen (1960) showed that the presence of CO 2 in the culture solution was essential for optimal nodulation and nitrogen fixation, resulting in the acceleration of the growth of red clover, pea (Pisum sativum), and bean (Phaseolus vulgaris). These phenomena were considered to be related to the root-hair development which depends on the presence of a relatively high concentration of carbon dioxide in the nutrient solution (Dale 1951;Bergmann 1958).…”

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confidence: 99%

Effect of CO₂-free air treatment on nitrogen fixation of soybeans inoculated withBradyrhizobium japonicumandRhizobium fredii

Yamakawa

Tanaka

Ishizuka

1997

Soil Science and Plant Nutrition

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Soybean (Glycine max L. Merr.) cultivars Akisirome and Peking were inoculated with Bradyrhizobium japonicum Is-21 and Rhizobium fredii USDA 194, respectively, and were grown in cylindrical pots containing sterilized vermiculite which were aerated with CO 2 -free air or ambient air to study the effects of CO 2 deficiency in the rhizosphere on plant growth, nodulation, and nitrogen fixation. The repressive effects of CO 2 -free air treatment were more conspicuous in Peking than Akisirome, and nodule number, nodule mass, amount of biologically fixed N and plant growth of Peking were reduced remarkably by the CO 2 -free air treatment.Acetylene reduction activity (ARA) of Peking inoculated with USDA 194 and Akisirome inoculated Is-21 was assayed in the absence and presence of CO 2 , ARA of Akisirome was not affected by the absence of CO 2 , while that of Peking decreased drastically.Based on these results, it was concluded that nitrogen fixation by Akisirome inoculated with B. japonicum Is-21 was not appreciably influenced by CO 2 deficiency in the rhizosphere, while that of Peking inoculated with R. fredii USDA 194 was severely repressed, and the decrease was estimated to be due to both the reduction of the nodule mass and specific nitrogen-fixing activity.

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Über die Beeinflussung der Wurzelbehaarung von Roggenkeimpflanzen durch verschiedene Außenfaktoren

Cited by 7 publications

References 7 publications

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

Chickpea Plant It’s Molecular Regulation of Root Hairs: A Review

Effect of CO₂-free air treatment on nitrogen fixation of soybeans inoculated withBradyrhizobium japonicumandRhizobium fredii

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Über die Beeinflussung der Wurzelbehaarung von Roggenkeimpflanzen durch verschiedene Außenfaktoren

Cited by 7 publications

References 7 publications

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

Development and replenishment of the P-depletion zone around the primary root of maize during the vegetation period

Chickpea Plant It’s Molecular Regulation of Root Hairs: A Review

Effect of CO2-free air treatment on nitrogen fixation of soybeans inoculated withBradyrhizobium japonicumandRhizobium fredii

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Product

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Effect of CO₂-free air treatment on nitrogen fixation of soybeans inoculated withBradyrhizobium japonicumandRhizobium fredii