Effect of temperature on the starch content of potato callus tissue

1991 ◽  
Vol 68 (3) ◽  
pp. 191-195 ◽  
Author(s):  
Steven R. Hagen ◽  
Paul Muneta ◽  
Duane LeTourneau ◽  
Janice Brown
Keyword(s):  
Callus Tissue ◽  
Starch Content ◽  
Effect Of Temperature ◽  
Potato Callus

Effect of temperature on the sugar content of potato callus tissue

1990 ◽  
Vol 67 (4) ◽  
pp. 209-215 ◽  
Author(s):  
Paul Muneta ◽  
S. Hagen ◽  
D. LeTourneau ◽  
J. Brown
Keyword(s):  
Callus Tissue ◽  
Sugar Content ◽  
Effect Of Temperature ◽  
Potato Callus

Methods to increase the starch content of potato tuber callus tissue

1993 ◽  
Vol 36 (4) ◽  
pp. 293-299 ◽  
Author(s):  
Steven R. Hagen ◽  
Steven Harrison ◽  
Paul Muneta ◽  
Duane Letourneau
Keyword(s):  
Potato Tuber ◽  
Callus Tissue ◽  
Starch Content

Effect of Light Intensity and Temperature on Photosynthetic Rate, Leaf Starch Content and Ultrastructure of Paspalum dilatatum

1975 ◽  
Vol 2 (2) ◽  
pp. 185 ◽  
Author(s):  
BJ Forde ◽  
HCM Whitehead ◽  
JA Rowley
Keyword(s):  
Growth Rate ◽  
Photosynthetic Rate ◽  
Starch Content ◽  
Dry Weight ◽  
Effect Of Temperature ◽  
Starch Accumulation ◽  
Paspalum Dilatatum ◽  
Minor Variation ◽  
Relative Growth ◽  
Light Intensities

;Paspalum dilatatum plants were grown in growth cabinets under two light intensities (224 and 90 W m-2) at day/night temperatures of 27.5/20.0, 20.0/12.5, 17.5/12.5 and 15.0/10.0°C. Additional plants were grown in the glasshouse and outside. Relative growth rate was closely correlated with the mean hourly photosynthetic rate of the plant during the day. Starch varied from 0.8 to 5.3 % of the leaf dry weight at the end of the night and from 3.0 to 11.6% at the end of the day. Photosynthetic rate of cabinet-grown plants remained constant during the day as starch accumulated. The rate declined for plants from outside, although their leaf starch levels were no higher than those of cabinet-grown plants. No evidence was found of feedback repression of photosynthetic rate caused by assimilate accumulation. There was only minor variation in mesophyll chloroplast structure between plants grown at different light intensities at the same temperature. A decline in temperature below 20.0/12.5°C increased swelling of mesophyll chloroplasts, as well as reducing development of the peripheral reticulum. The structure of bundle sheath chloroplasts was little affected by the environment apart from its effect on starch accumulation. While growth rate increased rapidly as temperature increased, there was much less effect of temperature on accumulation of starch during the day. It was concluded that photosynthesis and the accumulation of starch are less sensitive to temperature than is overall plant growth.

Starch-accumulating Sweet Potato Callus Tissue Devoid ofβ-Amylase but with Two Starch Phosphorylase Isozymes

1993 ◽  
Vol 57 (8) ◽  
pp. 1311-1315 ◽  
Author(s):  
Heng-Long Wang ◽  
Ping-Du Lee ◽  
Rong-Huary Juang ◽  
Jong-Ching Su
Keyword(s):  
Sweet Potato ◽  
Callus Tissue ◽  
Starch Phosphorylase ◽  
Potato Callus

ASSESSMENT OF GENETIC VARIATION IN POTATO CALLUS TISSUE UNDER SALINITY USING RAPD MARKERS

2012 ◽  
pp. 177-184
Author(s):  
F. Queirós ◽  
J.M. Almeida ◽  
F. Fidalgo ◽  
D.P.F. Almeida
Keyword(s):  
Genetic Variation ◽  
Rapd Markers ◽  
Callus Tissue ◽  
Potato Callus

scholarly journals Effects of Cold Treatments on Seedling Emergence and Growth of Lilium davidii var. unicolor Bulblets

HortScience ◽  
2021 ◽  
pp. 1-6
Author(s):  
Nan Tang ◽  
Rulong Jia ◽  
Jicheng Yin ◽  
Yan Wang ◽  
Daocheng Tang
Keyword(s):  
Low Temperatures ◽  
Storage Time ◽  
Starch Content ◽  
Soluble Sugar ◽  
Seedling Emergence ◽  
Soluble Sugars ◽  
Effect Of Temperature ◽  
Suitable Temperature ◽  
Lilium Davidii ◽  
Long Storage

For Lilium davidii var. unicolor bulblets produced by scale propagation, the effects of cold treatments on the sprouting and development of bulblets were studied. The results showed that 5 °C was a more suitable temperature than 2 or 10 °C. Bulblets treated at 5 °C for 3 weeks presented the best uniformity of seedling emergence, and the sprouting rate was 100%. Moreover, the largest bulbs were observed in this treatment after a growing season. It was found that long storage at low temperatures is unfavorable for bulb development. The weight and circumference of bulbs from bulblets that were cold-treated for more than 5 weeks were significantly less than those treated for 1 to 4 weeks. During the first 4 weeks of cold storage, the starch content of bulblets decreased significantly, coinciding with an increase in soluble sugars. The starch and soluble sugar contents in bulblets stored at 2 and 5 °C changed faster than those in bulblets stored at 10 °C. However, the effect of temperature on carbohydrates diminished gradually as the storage time increased. Long storage of bulblets at low temperatures is not good for subsequent growth and development. The results of this study provide important information for accelerating the scale propagation of L. davidii var. unicolor and maximizing bulb yield.

Nucleation of Disorder in Fe3Al Alloys

1967 ◽  
Vol 25 ◽  
pp. 312-313
Author(s):  
P. R. Swann ◽  
W. R. Duff ◽  
R. M. Fisher
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Annealing Temperature ◽  
Antiphase Domain ◽  
Effect Of Temperature ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries ◽  
Higher Temperature ◽  
The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

The development of dormancy in bulblets of Lilium speciosum generated in vitro. II. The effect of temperature

1990 ◽  
Vol 80 (3) ◽  
pp. 431-436 ◽  
Author(s):  
Isabelle Delvallee ◽  
Annie Paffen ◽  
Geert-Jan De Klerk
Keyword(s):  
Effect Of Temperature ◽  
Lilium Speciosum
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