scholarly journals Uptake of Potassium and Sodium by Seedlings of Sinapis Alba

1966 ◽  
Vol 19 (2) ◽  
pp. 257 ◽  
Author(s):  
MG Pitman
Keyword(s):  
Plant Growth ◽  
General Model ◽  
Cell Walls ◽  
Sinapis Alba ◽  
Anion Transport ◽  
Sodium Uptake ◽  
Lower Ratio ◽  
Total Potassium ◽  
Different Levels ◽  
Active Anion

Seedlings of Sinapis alba (mustard) have a lower potassium selectivity than those of barley, as shown by the lower ratio of potassium to sodium in the shoots of plants grown on the same solution. The ratio in the shoots is usually lower than in the roots, whereas in barley it is higher. In spite of this difference in selectivity, the uptake of potassium and sodium by mustard has much in common with that by barley. The total potassium and sodium uptake to the shoot is independent of the ratio in the solution; the ratio of potassium to sodium in the shoot is proportional to that in the roots, but not to that in solution; and potassium selectivity can be reduced by transpiration. Thus it appears that the same general model for ion uptake can be used for both plants, although they have different levels of selectivity. In this model it is suggested that total potassium and sodium uptake is controlled by an active anion transport coupled with plant growth by means of metabolism, but selectivity is determined during movement of ions into the stele through cytoplasm and cell walls.

scholarly journals Transpiration and the Selective Uptake of Potassium by Barley Seedlings (Hordeum Vulgare Cv. Bolivia)

1965 ◽  
Vol 18 (5) ◽  
pp. 987 ◽  
Author(s):  
MG Pitman
Keyword(s):  
Hordeum Vulgare ◽  
Active Transport ◽  
Transpiration Rate ◽  
Water Flux ◽  
Anion Transport ◽  
Potassium Uptake ◽  
Sodium Uptake ◽  
Total Uptake ◽  
Sodium And Potassium ◽  
Active Anion

Selective potassium uptake by barley seedlings decreases with increased solution concentrations above 20 m-equiv /1. This decrease is shown to be due to an action of transpiration. Total uptake of potassium and sodium was unaffected by transpiration, but increased transpiration rate increased sodium uptake and decreased potassium uptake. These changes in sodium and potassium content are difficult to explain in terms of "passive" metabolic components of uptake. It is suggested that sodium and potassium uptake to the shoot is controlled by active anion transport and that water flux acts on movement of sodium and potassium through the root to the site of active transport.

scholarly journals Study on quinolone accumulation and growth inhibition induced by quinolone levels of hydroponics

2021 ◽  
Vol 269 ◽  
pp. 02004
Author(s):  
Xiaojuan Wang ◽  
Yaojun Wang ◽  
Jiangwen Nian ◽  
Yongbo Sun ◽  
Yonghui Zhang ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Biomass ◽  
Inhibitory Effect ◽  
Organic Fertilizers ◽  
Hydroponic Experiment ◽  
Quinolone Antibiotics ◽  
Tobacco Seedlings ◽  
Food Safety Risk ◽  
Different Levels ◽  
Soil And Water

Residual antibiotics can enter soil and water bodies through organic fertilizers with food safety risk via plants absorption, while how do plant growth and quinolone accumulation respond to residual antibiotics levels in soil or water is not clear. Hydroponic experiment in greenhouse was conducted with floating seedlings of tobacco as model plant to investigate the responses of quinolone antibiotics accumulation and plant growth to different levels of ciprofloxacin (CIP) and norfloxacin (NOR). Results showed that CIP and NOR inhibited the growth of tobacco seedlings. The plant height, stem circumference, maximum leaf width, and maximum leaf area of tobacco seedlings were significantly decreased. So as to the plant biomass of leaves, stems, and roots. Accumulation of CIP in the tobacco seedlings in the T3 was 1.1 times that of the tobacco seedlings in the T1, NOR in the T4 was 1.2 times that of the tobacco seedlings in the T1. And the higher the concentration, the more significant the inhibitory effect. Both antibiotics can be absorbed and accumulated by tobacco seedlings. Additionally, the inhibitory effect of CIP was greater than that of NOR.

Impacts of Elevated Ozone and Ozone protectanton Plant Growth, Nutrients, Biochemical and Yield properties of Turnip (Brassica rapa)

2021 ◽  
Author(s):  
Boomiraj Kovilpillai ◽  
Sethupathi Nedumaran ◽  
Sudhakaran Mani ◽  
Jayabalakrishnan Raja Mani ◽  
Sritharan Natarajan ◽  
...  
Keyword(s):  
Plant Growth ◽  
Block Design ◽  
Ozone Exposure ◽  
Research Station ◽  
Growth Physiology ◽  
Elevated Ozone ◽  
Randomized Block Design ◽  
Size Tuber ◽  
The Impact ◽  
Total Potassium

Abstract An experiment was conducted at woodhouse farm, Horticultural Research Station, Ooty, in the period of October 2017 to March 2018, to quantify the impact of elevated ozone and ozone protectants spray on plant growth, nutrients, biochemical and yield properties of turnip crop in a factorial completely randomized block design replicated thrice. The elevated ozone exposure significantly reduces the plant height, tuber size, tuber weight, Chlorophyll ‘a’, Chlorophyll ‘b’, Total chlorophyll, total nitrogen, total potassium, total Manganese, Iron, Zinc, Copper inturnip. Meanwhile, the elevated ozone exposure significantly increased the total phosphorous, catalase and peroxide activity inturnip. However, ozone protectants played a major role to nullify the tropospheric ozoneeffect on growth, physiology, development and yield of turnip and among them panchagavya performed well followed by neem oil and ascorbicacid.

Response of F1 Tomato Hybrids to Different Levels of Plant Growth Regulators

1999 ◽  
Vol 2 (3) ◽  
pp. 885-886
Author(s):  
Shakeel Ahmad Jatoi ◽  
Abdul Ghafoor . ◽  
Obaid Ullah Sayal .
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Different Levels

Total chlorophyll, growth and productivity of soybean [Glycine Max (L) Merril] under different levels and sources of phosphorus and plant growth regulators in south Rajasthan, India

2016 ◽  
Author(s):  
Shankar Lal Khaswan ◽  
R. K. Dubey ◽  
R. C. Tiwari ◽  
S. K. Dubey ◽  
Raj Kumari Chaudhary
Keyword(s):  
Plant Growth ◽  
Chlorophyll Content ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Total Biomass ◽  
Total Chlorophyll ◽  
Water Spray ◽  
Benzyl Adenine ◽  
Total Chlorophyll Content ◽  
Different Levels

An experiment was conducted at the Instructional Farm of Rajasthan College of Agriculture, Udaipur during Kharif 2009 and 2010 on medium clay loam soils to assess the influence of different levels and sources of phosphorus fertilization as well as plant growth regulators on productivity of soybean. Twenty seven treatments i.e. three levels (20, 30 and 40 kg P2O5 ha-1) and three sources (Single super phosphate or SSP; phosphorus rich organic manure or PROM and di-ammonium phosphate or DAP) of phosphorus in main plots and three PGRs (water spray, benzyl adenine 50 ppm and NAA 100 ppm) in sub plots of a split plot design having three replications. Results revealed that application of 40 kg P2O5 ha-1 recorded significantly higher pooled yield (q ha-1) of grain (25.95), stover (37.34) and total biomass (63.29); crop growth rate or CGR (g m-2day-1) between 30-60 days after sowing ( DAS)(18.83) and 61-90 DAS (11.96); total chlorophyll content at 45 DAS (2.26%) and 60 DAS (2.80%); Leaf area index(LAI) at 45 DAS (1.56) and 60 DAS (3.44) and green leaves plant-1 at 45 DAS (11.98) and 60 DAS (21.43). Among different phosphorus sources, SSP outperformed DAP and PROM on pooled yield (q ha-1) of grain (25.12), stover (36.23) and total biomass (61.35); CGR (g m-2day-1) between 30-60 DAS (11.22) and 61-90 DAS (10.94); total chlorophyll content at 45 DAS (2.26%) and 60 DAS (2.76%); LAI at 45 DAS (1.51) and 60 DAS (3.42) and green leaves plant-1 at 45 DAS (11.77) and 60 DAS (21.35). Foliar application of NAA recorded significantly higher pooled yield (q ha-1) of grain (24.23), stover (35.73) and total biomass (60.01) than benzyl adenine and water spray. However, variations recorded under NAA and benzyl adenine in CGR, total chlorophyll content, LAI and green leave plant-1at different stages of soybean crop were statistically at par.

Actuation systems in plants as prototypes for bioinspired devices

2009 ◽  
Vol 367 (1893) ◽  
pp. 1541-1557 ◽  
Author(s):  
Ingo Burgert ◽  
Peter Fratzl
Keyword(s):  
Cell Walls ◽  
Cell Shape ◽  
Living Cells ◽  
Polymer Composition ◽  
Plant Cell Walls ◽  
Geometrical Constraints ◽  
Actuation Systems ◽  
Different Levels ◽  
Dead Tissue ◽  
Shape And Size

Plants have evolved a multitude of mechanisms to actuate organ movement. The osmotic influx and efflux of water in living cells can cause a rapid movement of organs in a predetermined direction. Even dead tissue can be actuated by a swelling or drying of the plant cell walls. The deformation of the organ is controlled at different levels of tissue hierarchy by geometrical constraints at the micrometre level (e.g. cell shape and size) and cell wall polymer composition at the nanoscale (e.g. cellulose fibril orientation). This paper reviews different mechanisms of organ movement in plants and highlights recent research in the field. Particular attention is paid to systems that are activated without any metabolism. The design principles of such systems may be particularly useful for a biomimetic translation into active technical composites and moving devices.

scholarly journals How do cell walls regulate plant growth?

2005 ◽  
Vol 56 (419) ◽  
pp. 2275-2285 ◽  
Author(s):  
David Stuart Thompson
Keyword(s):  
Plant Growth ◽  
Cell Walls
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