scholarly journals 5-Aminolevulinic Acid (ALA) Alleviated Salinity Stress in Cucumber Seedlings by Enhancing Chlorophyll Synthesis Pathway

2018 ◽  
Vol 9 ◽  
Author(s):  
Yue Wu ◽  
Xin Jin ◽  
Weibiao Liao ◽  
Linli Hu ◽  
Mohammed M. Dawuda ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Aminolevulinic Acid ◽  
Chlorophyll Synthesis ◽  
Cucumber Seedlings

scholarly journals Influence of lead on the chlorophyll content and on initial steps of its synthesis in greening cucumber seedlings

2014 ◽  
Vol 54 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Marek Burzyński
Keyword(s):  
Chlorophyll Content ◽  
Direct Effect ◽  
Aminolevulinic Acid ◽  
Acid Synthesis ◽  
Chlorophyll Synthesis ◽  
Lead Uptake ◽  
Synthesis Inhibition ◽  
Cucumber Seedlings ◽  
Tissue Hydration ◽  
Acid Dehydratase

Lead uptake by young cucumber (<em>Couches satires</em> L.) seedlings growing in 10<sup>-4</sup> and 10<sup>-3</sup> M PbCl<sub>2</sub> solution caused δ-aminolevulinic acid synthesis inhibition, reduced the activity of δ-aminolevulinic acid dehydratase and the chlorophyll centent in the cotyledons. Lead mainly accumulated in the roots (ca 93-96% of Pb uptake) and hypocotyls (ca 4-6%), whereas only trace Pb amounts were found in the cotyledons when 10<sup>-3</sup> M solution was used. It is supposed that one of the causes of the reduction of chlorophyll synthesis by lead is its influence on tissue hydration which diminished to about 50 per cent as compared with the control. The direct effect of lead on the examined steps of chlorophyll synthesis cannot, however, be ruled out.

Chilling-induced chlorosis in maize (Zea mays)

1985 ◽  
Vol 63 (4) ◽  
pp. 711-715 ◽  
Author(s):  
R. Hodgins ◽  
R. B. van Huystee
Keyword(s):  
Zea Mays ◽  
Chlorophyll Content ◽  
Sweet Corn ◽  
Aminolevulinic Acid ◽  
Chlorophyll Synthesis ◽  
Carotenoid Content ◽  
Control Tissue ◽  
Etiolated Seedlings ◽  
Chilling Temperatures ◽  
And Control

The effect of chilling temperatures on the porphyrin pathway leading to chlorophyll was studied in Seneca Chief hybrid sweet corn. One-week-old seedlings grown at 28 °C in a 14 h light: 10 h dark photoperiod synthesize negligible amounts of chlorophyll when exposed to 12 °C for a subsequent 6 d. When the chilled plant is then brought back to 28 °C, chlorophyll synthesis is restored to control levels. Little difference in carotenoid content was detected between chill-stressed and control tissue even after 4 d of stress. Small differences in the chlorophyll content per 106 chloroplasts could be detected between stressed and control seedlings. Etiolated seedlings synthesize negligible amounts of chlorophyll or its precursors when illuminated at 12 °C. Incubation of tissue with aminolevulinic acid at various temperatures from 12 to 22 °C resulted in an accumulation of precursors comparable to 28 °C control tissue. The ability of etiolated tissue to accumulate aminolevulinic acid was negligible when illuminated at 12 °C as compared with that in tissue illuminated at 28 °C.

Responses of gas exchange, chlorophyll synthesis and ROS-scavenging systems to salinity stress in two ramie (Boehmeria nivea L.) cultivars

2015 ◽  
Vol 53 (3) ◽  
pp. 455-463 ◽  
Author(s):  
C. J. Huang ◽  
G. Wei ◽  
Y. C. Jie ◽  
J. J. Xu ◽  
S. Y. Zhao ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Salinity Stress ◽  
Chlorophyll Synthesis ◽  
Ros Scavenging ◽  
Boehmeria Nivea
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