Iron Uptake in Different Plant Species as a Function of the pH Value of the Nutrient Solution

1958 ◽  
Vol 11 (4) ◽  
pp. 889-905 ◽  
Author(s):  
Carsten Olsen
Keyword(s):  
Plant Species ◽  
Nutrient Solution ◽  
Iron Uptake ◽  
Ph Value

scholarly journals Micropropagation of Achillea millefolium L. on half-strength ms medium and direct rooting and acclimatization of microshoots in hydroponic culture

2015 ◽  
pp. 99-112
Author(s):  
Marija Markovic ◽  
Dragana Skocajic ◽  
Mihailo Grbic ◽  
Matilda Djukic ◽  
Dragica Obratov-Petkovic ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
Nutrient Solution ◽  
Ph Value ◽  
Ex Vitro Rooting ◽  
In Vitro Rooting ◽  
Efficient Production ◽  
Ms Medium ◽  
Ex Vitro ◽  
Half Strength

The aim of this study was to determine the possibility of micropropagation of the medicinal plant A. millefolium on half-strength MS medium and ex vitro rooting and acclimatization of the obtained microshoots in hydroculture in order to establish an efficient production method. Two explant types were used: basal and terminal cuttings, and better results were achieved when terminal cuttings were used. The development of shoots in the multiplication phase was successful with a regeneration percentage of 100%. Ex vitro rooting in a modified Hoagland nutrient solution was successful (83%), but the percentage of in vitro rooting on half-strength MS medium without hormones was higher (95%). However, bearing in mind that mass production of A. millefolium is more efficient when the phase of in vitro rooting is excluded, this method could be recommended for commercial propagation of this medicinal plant. It is necessary to conduct additional research in order to optimize the composition, EC and pH value of the hydroponic nutrient solution.

Uptake and Phytotoxicity of Tebuthiuron

Weed Science ◽  
1977 ◽  
Vol 25 (5) ◽  
pp. 390-395 ◽  
Author(s):  
W.G. Steinert ◽  
J.F. Stritzke
Keyword(s):  
Zea Mays ◽  
Plant Species ◽  
Nutrient Solution ◽  
Secale Cereale ◽  
Foliar Application ◽  
Gold Rush ◽  
Ambrosia Artemisiifolia ◽  
Common Ragweed ◽  
Primary Activity ◽  
Treated Leaf

Differences in the phytotoxicity of tebuthiuron (N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimehtylurea) to nine plant species were observed on the basis of calculated GR50values. Japanese brome (Bromus japonicusThunb.) with a GR50value of 0.016 ppmw was the most susceptible and corn (Zea maysL. ‘Gold Rush’) with a GR50value of 0.436 ppmw the least susceptible. There was some growth suppression with foliar application but primary activity on all species was attributed to root uptake. The most significant translocation of labeled tebuthiuron was to the tops of common ragweed (Ambrosia artemisiifoliaL.) plants treated through the nutrient solution where 24.5% of the total amount recovered was detected after 24 h. Only 7.3% of the total amount recovered was detected in the top of rye (Secale cerealeL. ‘Elbon’) plants with the same treatment. With both species, more than 90% of the radioactivity recovered following foliar treatments was still in the treated leaf after 24 h. Less than 5.5% of the recovered activity for both species was in the tops, less than 3% in the roots, and less than 1.5% was in the nutrient solution.

Preemergence Herbicidal Properties of Nitralin Analogs in Nutrient Solution

Weed Science ◽  
1970 ◽  
Vol 18 (5) ◽  
pp. 629-630 ◽  
Author(s):  
W. A. Gentner
Keyword(s):  
Plant Species ◽  
Nutrient Solution ◽  
Amino Groups ◽  
Substituted Anilines ◽  
Mixed Nature

The preemergence herbicidal activities of 10 4-(methylsulfonyl)-2,6-dinitro-N,N-variously substituted anilines were determined on four plant species at four equimolar concentrations in nutrient solution. Several analogs were as active or slightly more active than 4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline [nitralin]. Most amino groups on these compounds were of a mixed nature. Preemergence toxicity decreased when theN-substituents contained more than six carbons or less than five.

Comparison of iron acquisition from Fe–pyoverdine by strategy I and strategy II plants

Botany ◽  
2011 ◽  
Vol 89 (10) ◽  
pp. 731-735 ◽  
Author(s):  
Matt Shirley ◽  
Laure Avoscan ◽  
Eric Bernaud ◽  
Gérard Vansuyt ◽  
Philippe Lemanceau
Keyword(s):  
Arabidopsis Thaliana ◽  
Plant Species ◽  
Iron Uptake ◽  
Iron Acquisition ◽  
Iron Status ◽  
Iron Nutrition ◽  
Perennial Species ◽  
Major Class ◽  
Graminaceous Plants ◽  
Strategy I

Iron is an essential micronutrient for plants and associated microorganisms. However, the bioavailability of iron in cultivated soils is low. Plants and microorganisms have thus evolved active strategies of iron uptake. Two different iron uptake strategies have been described in dicotyledonous and monocotyledonous graminaceous species. In bacteria, this strategy relies on the synthesis of siderophores. Pyoverdines, a major class of siderophores produced by fluorescent pseudomonads, were previously shown to promote iron nutrition of the dicotyledonous species Arabidopsis thaliana L. (Heynh.), whereas contradictory reports were made on the contribution of those siderophores to the nutrition of graminaceous annuals. Furthermore, no information has so far been available on graminaceous perennials. Here, the contribution of purified pyoverdine of Pseudomonas fluorescens C7R12 to the iron nutrition of two annual and perennial graminaceous plants was assessed and compared with that of two dicotyledonous plant species. Fe–Pyoverdine promoted the iron status of all plant species tested. With the exception of wheat, this promotion was more dramatic in graminaceous species than in dicotyledonous species and was the highest in fescue, a perennial species. The incorporation of 15N-labeled pyoverdine was consistent with the effect on the iron status of the plants tested.

Real-Time Monitoring and Automatic Control for Aerosol Cultivation of Lettuce

2014 ◽  
Vol 678 ◽  
pp. 299-304
Author(s):  
Bao Guo Yao ◽  
Zhe Feng Zhang
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Real Time ◽  
Nutrient Solution ◽  
Control Method ◽  
Ph Value ◽  
Agricultural Science ◽  
Monitoring And Control ◽  
Real Time Monitoring ◽  
And Control

The automatic monitoring and control method for aerosol cultivation of lettuce was proposed by real-time monitoring and automatic control of the cultivation environment, on-line detection and automatic control of nutrient solution, and the combination of field control and remote control, which has realized the intelligent management of aerosol cultivation of lettuce based on plant factory. The monitoring and control system of aerosol cultivation, the control model for the spray frequency of nutrient solution and the fuzzy control method for the pH value control of nutrient solution were introduced. The control system has been applied in the agricultural science and technology park, and the results show that the aerosol cultivation of lettuce has advantages over the traditional method.

scholarly journals Influence of increased doses of microelements in hydroponic nutrient solution on the yield of Capsicum annuum L. fruits and their capsaicin content

2013 ◽  
Vol 33 (1) ◽  
pp. 73-80 ◽  
Author(s):  
Tomasz J. Nowak
Keyword(s):  
Capsicum Annuum ◽  
Plant Species ◽  
Nutrient Solution ◽  
Dry Matter ◽  
Hydroponic Culture ◽  
Capsicum Annuum L ◽  
Standard Composition

The Wrocław version of hydroponic culture was applied. The content of particular microelements (Cu, B, Mn, Mo, Zn) or several of them jointly was increased ten times (to 6 mg/l) as compared to the standard composition of the nutrient solution. It was found that the yield of fruits and of capsaicin per plant was significantly higher with 10 times increased content of Cu and B or Cu+B+Mo or Cu+Mn+Mo or B+Mn+Mo. Moreover, Cu and Mn applied alone or in combinations with other microelements in 10-fold increased proportion caused a marked increase of capsaicin content in the dry matter of the fruit. It is suggested that the proportions of microelements should be chosen individually for each plant species and for each type of agroclimatic conditions

scholarly journals Impact of Low Iron and Phosphorus Stresses on Acidification of Nutrient Solution by Geranium

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 970B-970
Author(s):  
Matthew D. Taylor ◽  
Paul V. Nelson ◽  
Jonathan M. Frantz
Keyword(s):  
Plant Species ◽  
Nutrient Solution ◽  
Specific Rate ◽  
Solution Ph ◽  
Similar Solutions ◽  
Grower Survey ◽  
Substrate Ph ◽  
Complete Nutrient Solution

The cause of sudden substrate pH decline by geranium is unknown. Low Fe and low P have been shown to cause many plant species to acidify the substrate. Research was done to determine if low Fe or P stresses caused four geranium (Pelargonium ×hortorum Bailey) cultivars to acidify nutrient solution. Two cultivars were susceptible and two resistant to substrate acidification based on a grower survey. Rooted geranium cuttings were transferred to 4-L containers containing modified Hoagland's solution with N supplied as 15% NH4 and 85% NO3. The plants were grown in a greenhouse for 44 days. Treatments consisted of a complete nutrient solution and two similar solutions devoid of either Fe or P. Solutions pH was set at 5.8, changed weekly, and tested 3 and 6 days after each change. Because all cultivars showed similar responses, results were combined. Twenty days after transplanting (DAT), plants in all treatments, including control, caused solution pH to fall below 5. At 37 DAT, the solution pH levels for control, minus Fe, and minus P treatments were 4.1, 3.7, and 3.6, respectively. Results indicated that geranium is an acidifying plant when N is supplied as 15% NH4 and 85% NO3. Additionally, low Fe and low P stresses increase the acidification rate. Total dry weights of minus-P plants were about half that of minus-Fe plants. This indicated that plants under P stress had a higher specific rate of acidification than plants under Fe stress.

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