Improvement of physiological and phytochemical parameters of pot marigold (Calendula officinalis) using foliar application of zinc

2021 ◽  
Keyword(s):  
Foliar Application ◽  
Calendula Officinalis ◽  
Pot Marigold

scholarly journals The Morphological Responses of Calendula officinalis L. “Radio” to the Foliar Application of Benzyladenine and Different Light Spectra

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 460
Author(s):  
Barbara Frąszczak ◽  
Beata Janowska ◽  
Dariusz Świerk
Keyword(s):  
Foliar Application ◽  
Initial Period ◽  
Red Light ◽  
Negative Influence ◽  
Calendula Officinalis ◽  
Light Spectrum ◽  
Light Spectra ◽  
Pot Marigold ◽  
Calendula Officinalis L ◽  
High Share

Pot marigold is a valuable medicinal plant with great decorative value. Three combinations of light (white (W)—170 μmol m−2 s−1, white + blue (W+B)—230 μmol m−2 s−1, white + red (W+R)—230 μmol m−2 s−1) were used to analyse the influence of a diversified light spectrum on the morphological traits and flowering of Calendula officinalis L. “Radio”. The effect of foliar treatment of the plants with 6-benzyladenine (BA) at concentrations of 100, 150 and 200 mg dm−3 at all the light spectrum combinations was analysed. BA had negative influence on the earliness of florescence and delayed it even by more than 10 days. W+B light intensified the delay, whereas red light partly reduced it. The BA treatment had the greatest influence on the biometric traits of the plants at the initial period of their development. W+B light significantly inhibited the growth of the plants. A high share of red light in the spectrum positively affected the Fv/Fm value, the relative chlorophyll content and the percentage of dry matter in the plants. When the amount of blue or red light in the spectrum increased, it was possible to obtain specific biometric traits of Calendula without the BA treatment.

Irrigation effect on yield and desirable metabolites of pot marigold (Calendula officinalis L.) genotypes

2019 ◽  
Vol 60 (4) ◽  
pp. 467-478 ◽  
Author(s):  
Iman Ghadyeh Zarrinabadi ◽  
Jamshid Razmjoo ◽  
Alireza Abdali Mashhadi ◽  
Hassan Karimmojeni ◽  
Te-Ming Tseng
Keyword(s):  
Calendula Officinalis ◽  
Irrigation Effect ◽  
Effect On Yield ◽  
Pot Marigold ◽  
Calendula Officinalis L

scholarly journals The First Report of Stolbur Phytoplasma Associated with Phyllody of Calendula officinalis in Serbia

Plant Disease ◽  
2014 ◽  
Vol 98 (8) ◽  
pp. 1152-1152 ◽  
Author(s):  
S. Pavlovic ◽  
M. Starovic ◽  
S. Stojanovic ◽  
G. Aleksic ◽  
S. Kojic ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Natural Infection ◽  
Cytotoxic Activities ◽  
Rrna Gene ◽  
Calendula Officinalis ◽  
Aster Yellows ◽  
First Report ◽  
Pot Marigold ◽  
Stolbur Phytoplasma

Pot marigold (Calendula officinalis L.) is native to southern Europe. Compounds of marigold flowers exhibit anti-inflammatory, anti-tumor-promoting, and cytotoxic activities (4). In Serbia, pot marigold is cultivated as an important medicinal and ornamental plant. Typical phyllody, virescence, proliferation of axillary buds, and witches' broom symptoms were sporadically observed in 2011 in Pancevo plantation, Serbia (44°51′49″ N, 20°39′33″ E, 80 m above sea level). Until 2013, the number of uniformly distributed affected pot marigold plants reached 20% in the field. Due to the lack of seed production, profitability of the cultivation was seriously affected. Leaf samples from 10 symptomatic and 4 symptomless marigold plants were collected and total nucleic acid was extracted from midrib tissue (3). Direct PCR and nested PCR were carried out with primer pairs P1/16S-SR and R16F2n/R16R2n, respectively (3). Amplicons 1.5 and 1.2 kb in length, specific for the 16S rRNA gene, were amplified in all symptomatic plants. No PCR products were obtained when DNA isolated from symptomless plants was used. Restriction fragment length polymorphism (RFLP) patterns of the 1.2-kb fragments of 16S rDNA were determined by digestion with four endonucleases separately (TruI1, AluI, HpaII, and HhaI) and compared with those of Stolbur (Stol), Aster Yellows (AY), Flavescence dorée-C (FD-C), Poinsettia Branch-Inducing (PoiBI), and Clover Yellow Edge (CYE) phytoplasmas (2). RFLP patterns from all symptomatic pot marigold plants were identical to the Stol pattern, indicating Stolbur phytoplasma presence in affected plants. The 1.2-kb amplicon of representative Nv8 strain was sequenced and the data were submitted to GenBank (accession no. KJ174507). BLASTn analysis of the sequence was compared with sequences available in GenBank, showing 100% identity with 16S rRNA gene of strains from Paeonia tenuifolia (KF614623) and corn (JQ730750) from Serbia, and peach (KF263684) from Iran. All of these are members of the 16SrXII ‘Candidatus Phytoplasma solani’ group, subgroup A (Stolbur). Phytoplasmas belonging to aster yellows (16SrI) (Italy and Canada) and peanut witches' broom related phytoplasma (16SrII) group (Iran) have been identified in diseased pot marigold plants (1). To our knowledge, this is the first report of natural infection of pot marigold by Stolbur phytoplasma in Serbia. References: (1) S. A. Esmailzadeh-Hosseini et al. Bull. Insectol. 64:S109, 2011. (2) I. M. Lee et al. Int. J. Syst. Bacteriol. 48:1153, 1998. (3) J. P. Prince. Phytopathology 83:1130, 1993. (4) M. Ukiya et al. J. Nat. Prod. 69:1692, 2006.

scholarly journals First Report of Powdery Mildew Caused by Podosphaera xanthii on Calendula officinalis in Italy

Plant Disease ◽  
2008 ◽  
Vol 92 (1) ◽  
pp. 174-174 ◽  
Author(s):  
A. Garibaldi ◽  
G. Gilardi ◽  
M. L. Gullino
Keyword(s):  
Powdery Mildew ◽  
Its Region ◽  
Pathogenicity Test ◽  
Podosphaera Xanthii ◽  
Calendula Officinalis ◽  
First Report ◽  
Potted Plants ◽  
Blastn Analysis ◽  
Voucher Specimens ◽  
Pot Marigold

Calendula officinalis L. (Asteraceae) (pot marigold or English marigold) is an ornamental species grown in gardens and as potted plants for the production of cut flower. It was also used in ancient Greek, Roman, Arabic, and Indian cultures as a medicinal herb as well as a dye for fabrics, foods, and cosmetics. During the summer of 2007, severe outbreaks of a previously unknown powdery mildew were observed on plants in several gardens near Biella (northern Italy). Both surfaces of leaves of infected plants were covered with dense, white mycelia and conidia. As the disease progressed, infected leaves turned yellow and died. Mycelia and conidia also were observed on stems and flower calyxes. Conidia were hyaline, ellipsoid, born in short chains (four to six conidia per chain), and measured 27.0 to 32.1 (31.4) × 12.9 to 18.4 (18.2) μm. Conidiophores measured 49 to 77.3 (67.2) × 8 to 13.3 (10.8) μm and showed a foot cell measuring 44 to 59 (51.9) × 9.3 to 12.6 (11.3) μm followed by one shorter cell measuring 15.6 to 18.9 (17.6) × 10.4 to 13.6 (12.2) μm. Fibrosin bodies were present. Chasmothecia were spherical, amber colored, with a diameter of 89 to 100 (94.5) μm. Each chasmothecium contained one ascus with eight ascospores. On the basis of its morphology, the causal agent was determined to be a Podosphaera sp. (2). The internal transcribed spacer (ITS) region of rDNA was amplified using the primers ITS4/ITS6 and sequenced. BLASTn analysis (1) of the 588 bp showed a 100% homology with the sequence of Podosphaera xanthii (2). The nucleotide sequence has been assigned GenBank Accession No. EU100973. Pathogenicity was confirmed through inoculations by gently pressing diseased leaves onto leaves of healthy C. officinalis plants. Five plants were inoculated. Five noninoculated plants served as control. Plants were maintained in a greenhouse at temperatures ranging from 20 to 26°C. Eleven days after inoculation, typical symptoms of powdery mildew developed on inoculated plants. Noninoculated plants did not show symptoms. The pathogenicity test was carried out twice. To our knowledge, this is the first report of powdery mildew on C. officinalis in Italy. C. officinalis was previously described as a host to Sphaerotheca fuliginea (synonym S. fusca) in Great Britain (4) as well as in Romania (3). Voucher specimens are available at the AGROINNOVA Collection, University of Torino. References: (1) S. F. Altschul et al. Nucleic Acids Res. 25:3389, 1997. (2) U. Braun and S. Takamatsu. Schlechtendalia 4:1, 2000. (3) E. Eliade. Rev. Appl. Mycol. 39:710, 1960. (4) F. J. Moore. Rev. Appl. Mycol. 32:380, 1953.

Sign in / Sign up

Export Citation Format

Share Document