scholarly journals Influence of various chemical compounds on postharvest longevity of cut leaves of Waldsteinia geoides Willd.

2014 ◽  
Vol 67 (3) ◽  
pp. 83-90 ◽  
Author(s):  
Maria P. Ulczycka-Walorska ◽  
Agnieszka Krzymińska
Keyword(s):  
Gibberellic Acid ◽  
Chemical Compounds ◽  
Favorable Effect ◽  
Application Method ◽  
Postharvest Longevity ◽  
Cut Leaves ◽  
Leaf Greenness ◽  
Greenness Index ◽  
Methods Of Application

The influence of conditioning and different methods of application of chemical compounds on cut leaves of <em>Waldsteinia geoides </em>was assessed<em>.</em> Gibberellic acid and benzyladenine at a concentration of 50 or 100 mg × dm<sup>-3</sup>, and 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup> were used in the process of conditioning. The leaves were conditioned in two different ways. In the first one, half of leaf stalks were soaked for 24 hours. In the latter, whole leaf blades were dipped for thirty seconds. Cut leaves were stored either in water or in the solution of 8-hydroxyquinoline sulphate at a concentration of 200 mg × dm<sup>-3</sup>. It was both the chemical compounds applied and the application method that influenced the postharvest longevity of the leaves. The leaves conditioned in 8HQS and stored in water, those conditioned in BA at a concentration of 50 mg × dm<sup>-3</sup> and stored in 8HQS, and those which were not conditioned and stored in 8HQS exhibited the highest level of postharvest longevity. The application of 8HQS for conditioning had a favorable effect on the increase in the weight of<em> Waldsteinia geoides</em> cut leaves<em>.</em> 8HQS applied in storing resulted in a smaller decrease in the values of the leaf greenness index.

scholarly journals Effect of Benzylaminopurine, Gibberellic Acid, Silver Nitrate and Silver Thiosulphate, on postharvest longevity of cut leaves of Dracaena

2012 ◽  
Vol 40 (2) ◽  
pp. 157 ◽  
Author(s):  
RMB Subhashini ◽  
NLK Amarathunga ◽  
SA Krishnarajah ◽  
JP Eeswara
Keyword(s):  
Gibberellic Acid ◽  
Silver Nitrate ◽  
Silver Thiosulphate ◽  
Postharvest Longevity ◽  
Cut Leaves

scholarly journals SPAD Leaf Greenness Index: Green Mass Yield Indicator of Maize (Zea mays L.), Genetic and Agriculture Practice Relationship

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 830
Author(s):  
Piotr Szulc ◽  
Jan Bocianowski ◽  
Kamila Nowosad ◽  
Waldemar Zielewicz ◽  
Joanna Kobus-Cisowska
Keyword(s):  
Mineral Fertilizer ◽  
Group Method ◽  
Growth Stages ◽  
Arithmetic Means ◽  
Stay Green ◽  
Plant Nitrogen ◽  
Green Mass ◽  
The Impact ◽  
Leaf Greenness ◽  
Greenness Index

The study presents the results of two field studies (Experiment I, Experiment II), whose aim was to assess the impact of agriculture factors on maize green mass and leaf greenness index (Soil and Plant Analysis Development, SPAD) in critical growth stages, as well as to determine the relationship between the SPAD index and the yield of green maize for ensiling. It was shown that thermal and humidity conditions in maize growing seasons determined the value of the SPAD leaf greenness index and the yield of maize harvested for silage. Row application of mineral fertilizer (N, NP) and selection of “stay-green” varieties guarantee a higher yield of maize green mass. Growing maize in direct sowing reduces chlorophyll content expressed in SPAD units, thereby reducing plant nitrogen condition, which significantly decreases the yield of biomass intended for silage. The SPAD leaf greenness index determined in critical stages of maize growth can be considered as a yield predictor of green mass for ensiling. The examined maize cultivars were divided into two groups on the basis of hierarchically grouping using the unweighted pair group method of arithmetic means. The first group comprised cultivars SY Cooky and Drim “stay-green,” while the second one included cultivars ES Paroli “stay-green” and ES Palazzo.

scholarly journals Effect of growth regulator Kelpak SL on the formation of aboveground biomass of Festulolium braunii (K. Richt.) A. Camus

2013 ◽  
Vol 66 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Jacek Sosnowski ◽  
Kazimierz Jankowski ◽  
Beata Wiśniewska-Kadźajan
Keyword(s):  
Growth Regulator ◽  
Aboveground Biomass ◽  
Leaf Blade ◽  
Biomass Yield ◽  
Stem Elongation ◽  
Soil Material ◽  
Natural Plant ◽  
Full Period ◽  
Leaf Greenness ◽  
Greenness Index

A study on the cultivation of <em>Festulolium braunii</em> cv. 'Felopa' was carried out using polyurethane rings with a diameter of 36 cm and a height of 40 cm, which were sunk into the ground to a depth of 30 cm and filled with soil material. In this experiment, Kelpak SL was used as a bioregulator. It consists of natural plant hormones such as auxins (11 mg in dm<sup>3</sup>) and cytokinins (0.03 mg in dm<sup>3</sup>). The experimental factors were as follows: A1-control; A2 – 20% solution of the growth regulator; A3 – 40% solution; and A4 – 60% solution. The preparation was applied to all three regrowths in the form of spray, at a rate of 3 cm<sup>3</sup> ring<sup>-1</sup>, at the stem elongation stage. The full period of this experiment was in the years 2010–2011. During this time, detailed investigations were carried out on aboveground biomass yield (g DM ring<sup>-1</sup>), number of shoots (pcs ring<sup>-1</sup>), leaf blade length (cm), width of the leaf blade base (mm), leaf greenness index (SPAD). The study showed a significant effect of the growth regulator on the formation of <em>Festulolium braunii</em> biomass. However, its highest effectiveness was observed when the 60% solution was applied.

Effect of Pulsing on Postharvest Longevity of Cut Leaves of Lace Fern/Bridal Fern (Asparagus setaceus syn. Plumosus)

2014 ◽  
Vol 84 (3) ◽  
pp. 735-742 ◽  
Author(s):  
S. A. Safeena ◽  
R. Jayanthi ◽  
B. Raju ◽  
S. Jaganath ◽  
B. M. Ramakrishna ◽  
...  
Keyword(s):  
Postharvest Longevity ◽  
Cut Leaves

scholarly journals Effect of growth regulators on the postharvest longevity of cut flowers and leaves of the calla lily (Zantedeschia Spreng.)

2012 ◽  
Vol 64 (4) ◽  
pp. 91-98 ◽  
Author(s):  
Beata Janowska ◽  
Anna Stanecka
Keyword(s):  
Protein Degradation ◽  
Growth Regulators ◽  
Chlorophyll Degradation ◽  
Cut Flowers ◽  
Calla Lily ◽  
Combined Application ◽  
Continuous Basis ◽  
Postharvest Longevity ◽  
Greenness Index

The conditioning of flowers of the calla lily cultivar 'Albomaculata' in BA at concentrations of 50-150 mg×dm<sup>-3 </sup>extends their postharvest longevity by 6.2-14.5 days. An extension of the longevity of the flowers by 15 days can be obtained after the application of a solution of 8HQS with saccharose on a continuous basis. Effective in improving the longevity of leaves of cultivar 'Sunglow' is GA<sub>3</sub> at a concentration of 400 mg×dm<sup>-3</sup>. What is more, its application at concentrations of 300-400 mg×dm<sup>-3</sup> boosts their greenness index. GA<sub>3</sub> at concentrations of 50 and 100 mg×dm<sup>-3</sup> extends the postharvest longevity of leaves of the cultivar 'Black Eyed Beauty' by 18 and 11 days, respectively, while BA shortens it. A combined application of BA and GA<sub>3</sub> inhibits chlorophyll degradation, while GA<sub>3</sub> and a mixture of BA and GA<sub>3</sub> inhibit protein degradation.

scholarly journals By-Plant Prediction of Dry Matter Yields at Various Growth Stages of Maize Plants (Zea mays L.) Using Leaf Greenness Indicator in Climatic Conditions of Poland

2021 ◽  
Vol 11 (20) ◽  
pp. 9513
Author(s):  
Waldemar Zielewicz ◽  
Barbara Wróbel ◽  
Piotr Szulc ◽  
Henryk Bujak ◽  
Barbara Stachowiak
Keyword(s):  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Mineral Fertilization ◽  
Stay Green ◽  
Maize Varieties ◽  
Maize Plants ◽  
Leaf Greenness ◽  
K Fertilization ◽  
Greenness Index

Predicting yield at an early growth stage allows one to optimize the amount and timing of nitrogen fertilization to maximize crop yield. The aim of the study was to determine how different nitrogen doses would affect the nutrition of two maize varieties (Zea mays L.) with this element and their yields, and to demonstrate the potential of using the SPAD index as an early-stage predictor of dry matter yield (DMY) of maize biomass. The field experiment, with different pre- and post-sown N fertilizer doses, was conducted for two years in Poland. The two-factor experiment was set up in a randomized block design with three field replicates. There were four mineral fertilization variants: (I) 120 kg N·ha−1 without P and K fertilization, (II) 120 kg N·ha−1 + PK, (III) 160 kg N·ha−1 + PK, and (IV) 200 kg N·ha−1 + PK. The second-order factor was two stay-green maize varieties: Delitop (FAO 240) and Magitop (FAO 270). The mean values of the SPAD index of maize depended on the nitrogen dose. When the dose was increased from 120 kg·ha−1 to 200 kg·ha−1 with constant P and K fertilization, the value of the leaf greenness index increased significantly. The plants of both maize varieties fertilized with nitrogen at a dose of 120 kg N·ha−1 without P and K were characterized by the lowest values of the SPAD index, regardless of the year of the experiment. When the nitrogen dose was supplemented with P and K, the plants’ nutrition with nitrogen improved significantly. The values of the SPAD index in the maize plants of the variety Magitop were significantly greater than in the plants of the variety Delitop. The coefficients of correlation calculated for both maize varieties were highly significant at all measurement dates. Therefore, it is possible to conclude that the SPAD leaf greenness index can be used as an important, reliable, and non-invasive indicator for maize yield prediction. Nutrition of maize plants with nitrogen proved to be the main determinant of variability of the biomass yield. For this reason, it was the basis for the verification of individual mineral fertilization variants. The lack of phosphorus and potassium in the dose of mineral fertilizer limited the yield regardless of the variety, as compared to the variant that was optimally balanced with the nitrogen dose.

scholarly journals Evaluation of Chemical Ripeners for Sugarcane

1969 ◽  
Vol 56 (4) ◽  
pp. 370-396
Author(s):  
G. Samuels ◽  
A. Vélez ◽  
R. A. Yates ◽  
B. Walker
Keyword(s):  
Puerto Rico ◽  
Gibberellic Acid ◽  
Standard Error ◽  
Field Experiments ◽  
Chemical Compounds ◽  
Northern Coast ◽  
Southern Coast ◽  
Rainy Weather ◽  
Small Plot ◽  
The Mean

Eight chemical compounds were evaluated in 13 field experiments to determine if they could ripen sugarcane at the end of the harvest season, May-June 1970, on the humid northern coast (Loíza) and the irrigated southern coast (Aguirre and Mercedita) of Puerto Rico. C.P. 41845 (Monsanto) ripened sugarcane at Loíza and Mercedita when the control plots indicated dropping sucrose and purity values due to rainy weather. There were significant increases with the 2- and 4-pound per acre applications for pol, Brix and sucrose-percent-cane for the mean of the 6-week period after application. At Aguirre, there were no significant increases in sucrose components for individual samples or mean of all sampling dates. The control plots for this trial showed increasing sucrose and purity levels for the 6-week period. Pesco 1815 at 1.5-pound and 60CS16 at 0.5-pound per acre rates gave positive increases in the sucrose components, Brix, sucrose-percent-cane and purity at Mercedita, but not at Loíza. The results suggest that the success or failure of these three compounds to ripen the cane at the various experimental sites may depend on the degree and tendency of maturity of the cane. Cane with low or dropping sucrose and purity levels responded to the ripening compounds, whereas cane with naturally high or increasing sucrose or purity values failed to respond. Gibberellic acid, Dalapon, Silicon, Ethrel 68-250 and Cycocel failed to give significant increases in pol-percent-cane, Brix, sucrose-percent-cane or purity. The experimental techniques of applying sprays with a pneumatic-type tank equipped with a long lance for small-plot experimentation was discussed. To reduce the standard error it is suggested that the number of replications be increased and care taken in selecting plots for uniform stand and with a minimum of lodged cane.

Investigations in the Triticinae I. Colchicine techniques for chromosome doubling in interspecific and intergeneric hybridization

1950 ◽  
Vol 40 (1-2) ◽  
pp. 9-18 ◽  
Author(s):  
G. D. H. Bell
Keyword(s):  
Differential Cross ◽  
Chromosome Doubling ◽  
Interspecific Crosses ◽  
Intergeneric Hybridization ◽  
Intergeneric Crosses ◽  
Small Glass ◽  
Group Response ◽  
Cut Leaves ◽  
Plant Fertility ◽  
Methods Of Application

1. Sixteen colchicine treatments, involving five main methods of application and six concentrations, have been used on Triticum interspecific crosses, Triticum—Aegilops intergeneric crosses and Agropyron—Triticum intergeneric crosses.2. The efficacy of the major treatments in terms of plant survival, plant fertility and ear fertility has been compared, and the most successful method of application has been found to be absorption through the cut leaves—i.e. capping cut-back tillers with a small glass phial containing colchicine.3. Fertility induced by colchicine is not complete. In plants producing grain, every ear is not necessarily fertile, nor are all spikelets in fertile ears usually fertile.4. Evidence has been obtained of differential cross response to colchicine action, and also of cross-group response to particular treatments.

scholarly journals Post-harvest longevity of leaves of the sea lavender (Limonium latifolium (Sm.) Kuntze) after application of growth regulators

2013 ◽  
Vol 40 (No. 4.) ◽  
pp. 172-176
Author(s):  
B. Janowska ◽  
R. Grabowska ◽  
E. Ratajczak
Keyword(s):  
Gibberellic Acid ◽  
Growth Regulators ◽  
Ornamental Plants ◽  
Favourable Effect ◽  
Distilled Water ◽  
Post Harvest ◽  
Conditioning Treatment ◽  
Sea Lavender ◽  
Leaf Greenness

Conditioning is a simple and effective method of post-harvest longevity of both flowers and florists&rsquo; greens. Performing this treatment immediately after harvest by the producer increases the quality of floral products expressed as their post-harvest longevity. The purpose of this study was to assess the influence of four growth regulators from the gibberellin and cytokinin groups applied as a 4-h conditioning treatment of leaf blades and to determine any effects on post-harvest longevity of leaves of Limonium latifolium. The leaves were harvested early in the morning from the department of ornamental plants collection. Selected leaves were fully-developed and had no damage or discolouring. Gibberellic acid, benzyladenine, meta- methoxytopolin and its riboside at the concentrations of 25, 50 and 75 mg/dm<sup>3 </sup>were taken up in a solution for 4-h leaf-conditioning of Limonium latifolium at the temperature of 18&ndash;20&deg;C. After the conditioning treatment the leaves were placed in distilled water. Leaves placed into distilled water immediately after cutting served as control. Gibberellic acid, benzyladenine and topolins applied as leaf conditioning treatment extended the post-harvest longevity of leaves of Limonium latifolium. Examined growth regulators, with the exception of riboside of meta-methoxytopolin, also had a favourable effect on the index of leaf greenness.

scholarly journals Effect of daminozide and flurprimidol on growth, flowering and bulb yield of Eucomis autumnalis (Mill.) Chitt.

2017 ◽  
Vol 29 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Piotr Salachna ◽  
Agnieszka Zawadzińska
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulators ◽  
Flower Senescence ◽  
Foliar Sprays ◽  
Commercial Plant ◽  
Leaf Greenness ◽  
Greenness Index ◽  
Pot Plant ◽  
Bulb Yield

AbstractEucomis autumnalis (Mill.) Chitt., commonly known as pineapple lily, is a new ornamental pot plant with great marketing potential. This work evaluated the effects of two gibberellin synthesis inhibitors (daminozide and flurprimidol) applied as commercial plant growth regulators (PGRs) B-Nine and Topflor on the growth, flowering, and bulb yield in E. autumnalis. The PGRs were applied three times as substrate drenches or foliar sprays at the concentration of 15 mg dm-3(flurprimidol) or 4250 mg dm-3(daminozide). Plant growth was restricted only by flurprimidol, particularly when it was applied as substrate drenches. Plant height was reduced by 48% at anthesis and by 38% at flower senescence, compared to the untreated control. Regardless of the application method, flurprimidol increased the leaf greenness index (SPAD) and bulb weight. Daminozide treatments were ineffective in controlling plant height and negatively influenced bulb weight. Foliar sprays of daminozide increased the length of inflorescences and the number of flowers per inflorescence.

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