Transformation of Zinnia elegans Jacq. as an ornamental potted plant by daminozide application

Zinnia elegans Jacq. is one of the ornamental plants potential to be used as a potted ornamental plants. The problem to be resolved is the size of the plant can reach 1 m, so it is necessary to modify the plant height into 20 cm to 25 cm using retardant (plant growth regulator), called daminozide. The purpose of this study was to determine the best concentration and soaking time using daminozide to inhibit the growth of zinnia. The research was conducted at Mangkuyudan 57, Yogyakarta. This research was arranged in a factorial design with 3 blocks as replication. Different concentrations of daminozide were used as first factor with three levels (1 g.L-1, 2 g.L-1, and 3 g.L-1) and soaking times were used as the second factor (12 h, 24 h, and 36 h). The data were analyzed using analysis of variance and continued with HSD-Tukey at the α = 5 %. The results showed that there were an interaction between daminozide concentration and soaking time in the height of Z. elegans. There were also positive correlation between plant height, number of flower, and flowering period. The best combination of daminozide concentration and soaking times were 2 g.L-1 and 12 h. This treatment gave the best height that fit to the criteria of a potted plant which was 20.08 cm. However, it reduced flower’s diameter, number of flowers, and canopy’s size.

Download Full-text

Physalis size reduction for potted ornamental plant use

Ciência e Agrotecnologia ◽

10.1590/1413-70542016405031716 ◽

2016 ◽

Vol 40 (5) ◽

pp. 555-564 ◽

Cited By ~ 1

Author(s):

Emily Bosch ◽

Francine Lorena Cuquel ◽

Grasiela Bruzamarello Tognon

Keyword(s):

Plant Growth ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Ornamental Plants ◽

Foliar Spray ◽

Ornamental Plant ◽

Plant Use ◽

Potted Plant ◽

Physalis Angulata ◽

Plant Acceptability

ABSTRACT The consumer's constant search for novelties in the area of ornamental plants has inspired the use of species that are normally used for other purposes, such as fruit-bearing plants, to be introduced into floriculture. The physalis, a fruit-bearing plant, with a beautiful accrescent fruiting calyx that envelops the berry, can be used for these purposes. However, this plant can reach 70 cm high, which makes it unviable to be used as an indoor plant. The objective of this research was to decrease the size of the physalis (Physalis angulata) for ornamental use, pot it and apply the plant growth regulator Paclobutrazol (PBZ). The PBZ growth regulator was applied only once, via foliar spray at the concentrations of 0, 30, 60, 90, 120 and 150 mg a.i L- 1, as well as via irrigation in the substrate at concentrations of 0, 5, 10, 15, 30 and 60 mg a.i L- 1. Along with the quantitative variables, a plant acceptability test was carried out when it was considered ideal for commercialization. The obtained results clearly show that it is possible to reduce the size of the physalis for use as a potted plant by using PBZ with foliar applications at the concentration of 90 mg a.i L-1 or by using irrigation applications directly in the substrate at a concentration of 5 mg a.i L-1.

Download Full-text

Response of winter barley cultivars to nitrogen and a plant growth regulator in relation to lodging

The Journal of Agricultural Science ◽

10.1017/s0021859600077583 ◽

1991 ◽

Vol 116 (2) ◽

pp. 191-200 ◽

Cited By ~ 12

Author(s):

E. M. White

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Unit Length ◽

Dry Weight ◽

Field Trials ◽

Winter Barley ◽

Barley Cultivars ◽

Damage Susceptibility

SUMMARYApplications of nitrogen and a plant growth regulator (mepiquat chloride and ethephon) were used to manipulate stem structure and induce differing degrees of damage due to leaning and lodging in six cultivars of winter barley grown in Belfast, UK, in 1986/87. Weighted incidences of leaning and lodging were combined to give an index indicating damage susceptibility of the cultivars. The index was very high (70) in Pipkin and ranged between 1 and 18 in the other cultivars. Differences between cultivars in number of internodes, plant height and stem weight did not explain their differences in resistance to damage. However, dry weight per unit length ranged from 2·35 and 2·34 mg/mm in the strongest cultivars, Panda and Jennifer, respectively, to 1·75 mg/mm in the weakest cultivar, Pipkin.Nitrogen application increased plant height but did not affect dry weight/main stem, so that dry weight/unit length of stem decreased. The growth regulator treatments reduced plant height and although dry weight/stem did not decrease significantly, dry weight/unit length of stem was similar in treated and untreated plots.Dry weight/unit length has potential as an objective indicator of straw strength in winter barley cultivars and could be used in cultivar evaluation in the absence of damage in field trials.

Download Full-text

Effect of Bensulfuron-Methyl on Cotton (Gossypium hirsutumL.) Growth and Development

Weed Technology ◽

10.1017/s0890037x00040914 ◽

1996 ◽

Vol 10 (4) ◽

pp. 851-855

Author(s):

C. Dale Monks ◽

Michael G. Patterson ◽

Malcolm Pegues

Keyword(s):

Methyl Ester ◽

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Growth And Development ◽

Field Experiments ◽

Mepiquat Chloride ◽

Boll Rot ◽

Effect On Yield

Field experiments were conducted in Alabama from 1992 through 1994 to evaluate the potential of the methyl ester of bensulfuron applied at sublethal rates as a plant growth regulator for reducing plant height and boll rot in cotton. Bensulfuron at 0.017 and 0.034 g ai/ha or mepiquat chloride at 10 g ai/ha was applied POST alone at the pinhead square or early-bloom stage of cotton growth or sequentially at 0.017 followed by (fb) 0.017 g/ha, 0.034 fb 0.034 g/ha of bensulfuron and 5 fb 5, 10 fb 10, 10 fb 20, or 20 fb 20 g/ha of mepiquat chloride. Mepiquat chloride had no effect on yield in 1992 and 1994 but decreased yield when applied sequentially in 1993. Bensulfuron was generally detrimental to first position fruit retention, and it delayed maturity. Treatments that reduced plant height did not reduce boll rot. Bensulfuron treatments that reduced plant height also reduced yield; therefore, the potential for its use as a growth regulator in cotton appears limited.

Download Full-text

Effects of plant growth regulator applications on malting barley in western Canada

Canadian Journal of Plant Science ◽

10.1139/cjps-2019-0200 ◽

2020 ◽

Vol 100 (6) ◽

pp. 653-665

Author(s):

B.D. Tidemann ◽

J.T. O’Donovan ◽

M. Izydorczyk ◽

T.K. Turkington ◽

L. Oatway ◽

...

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Kernel Weight ◽

Western Canada ◽

Malting Barley ◽

Seeding Rate ◽

Malt Quality ◽

Days To Maturity

Malting barley is important in western Canada, yet many malting cultivars do not meet malt quality standards, in part due to lodging. Lodging can decrease barley yield and quality thereby reducing the acceptability for malting. In other countries, plant growth regulator (PGR) applications are used to mitigate lodging. Chlormequat chloride (chlormequat), trinexapac-ethyl (trinexapac), and ethephon were tested at five locations over 3 yr in western Canada for their ability to limit lodging, as well as their effects on yield, agronomic traits, and pre-malt quality characteristics. PGR applications occurred between Zadoks growth stage (GS) 30–33 for chlormequat and trinexapac and GS 37–49 for ethephon. Seeding rates of 200, 300, and 400 seeds m−2 of CDC Copeland barley were used to increase the likelihood of lodging. Increased seeding rate decreased tillers per plant, height, days to maturity, kernel protein, and kernel weight. Ethephon increased the number of tillers per plant and decreased plant height, kernel plumpness, and kernel weight. Trinexapac decreased plant height and kernel weight. Days to maturity was investigated across site-years, with ethephon increasing maturity in 60% of comparisons. Trinexapac and chlormequat had limited effects on maturity. Lodging was investigated across site-years, with trinexapac showing the largest number of lodging reductions and scale of reductions. Ethephon reduced lodging in 36% of comparisons, while chlormequat had inconsistent effects. None of the products affected yield or grain protein. The results suggest PGRs may not be the solution to lodging for CDC Copeland barley on the Canadian Prairies; however, trinexapac shows the most promise of the products tested.

Download Full-text

Effect of triapenthenol plant-growth regulator on canola height, yield, side branches and pod density

Canadian Journal of Plant Science ◽

10.4141/cjps92-140 ◽

1992 ◽

Vol 72 (4) ◽

pp. 1153-1156 ◽

Cited By ~ 2

Author(s):

K. J. Kirkland

Keyword(s):

Brassica Napus ◽

Plant Growth ◽

Field Experiment ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Growth And Development ◽

Management Tool ◽

Brassica Napus L ◽

Growing Conditions

A 3-yr field experiment was conducted at the Scott Experimental Farm to determine the effect of the growth regulator, triapenthenol, on the growth and development of Argentine canola (Brassica napus L.). Triapenthenol reduced plant height 25–45 cm under optimal growing conditions. Increases in yield, branches and total pods were observed. Application at the bud stage was more effective than earlier treatment in the rosette. It was concluded that triapenthenol application to canola could be a useful management tool, particularly under optimal growing conditions.Key words: Canola, growth regulator, RSW-0411, lodging

Download Full-text

Performance of Sesame (Sesamum indicum L.) as Influenced by 2,4 – Dichlorophenoxyacetic Acid and NPK Fertilizer

Cercetari Agronomice in Moldova ◽

10.2478/cerce-2018-0036 ◽

2018 ◽

Vol 51 (4) ◽

pp. 60-72

Author(s):

E.K. Eifediyi ◽

F.O. Ogedegbe ◽

N.B. Izuogu ◽

C.A. Adedokun ◽

A. Katibi ◽

...

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Growth And Yield ◽

Dichlorophenoxyacetic Acid ◽

Significant Difference ◽

Npk Fertilizer ◽

2,4 Dichlorophenoxyacetic Acid ◽

Savannah Zone

Abstract The Guinea savannah zone of Nigeria is beset by increasing population and infrastructural development, thereby putting pressure on available land with rapidly declining fertility due to low organic matter content, soil erosion, high temperature and seasonal bush burning. Sesame is cultivated in this zone and the yield has remained very low, compared to yield in other parts of the world. This could be attributed to poor nutrient status and poor cultural practices used by peasant farmers. A field experiment was conducted at the Teaching and Research Farm, University of Ilorin, Nigeria, in a southern Guinea savannah zone in 2015 and repeated in 2016 cropping season to determine the effects of 2,4-Dichlorophenoxyacetic acid (2,4-D), a plant growth regulator and NPK fertilizer on the growth and yield of sesame. The experiment was laid out as a factorial arrangement, fitted into a randomized complete block design replicated thrice. The factors imposed were 2,4-D (0, 5 and 10 ppm ha−1) and NPK 15:15:15 (0, 100, 200 and 300 kg ha−1). Data were collected on vegetative traits (plant height, number of leaves, leaf area) and yield components (number of capsules per plant; yield per plant and per hectare). The data were subjected to analysis of variance (ANOVA) using the Genstat statistical package 17th edition and significant means were separated by using the least significant difference at 5% level of probability. The result revealed that using plant growth regulator and NPK fertilizer had significant effects (p<0.05) on plant height (151 cm) and yield per hectare (530 kg/ha). The qualitative and quantitative analysis of the seeds further reaffirmed the presence of bioactive compounds, such as saponins, tannins, flavonoids and phenolic compounds, which are important health promoting food in the seeds.

Download Full-text

Vegetatively Propagated Geraniums Respond Similarly to Drench Applications of Paclobutrazol or Uniconazole

HortTechnology ◽

10.21273/horttech.10.1.151 ◽

2000 ◽

Vol 10 (1) ◽

pp. 151-153 ◽

Cited By ~ 3

Author(s):

Brian E. Whipker ◽

Shravan K. Dasoju ◽

Michael R. Evans

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Canopy Height ◽

Height Control ◽

Total Height ◽

Potted Plants ◽

Total Plant ◽

Leaf Canopy

Drench applications of paclobutrazol or uniconazole were applied at doses of 0, 0.0025, 0.005, 0.01, 0.02, or 0.04 mg a.i./pot (28,350 mg = 1.0 oz) to vegetatively propagated `Aurora', `Medallion Dark Red', and `Pink Satisfaction' geranium (Pelargonium ×hortorum L.H. Bailey). Geranium total plant height, leaf canopy height, and plant diameter responded similarly to drench applications of either paclobutrazol or uniconazole. There was a significant quadratic relationship between plant growth regulator (PGR) dose and total plant height and leaf canopy height for `Aurora' and `Medallion Dark Red', with total plant height and leaf canopy height being shorter as paclobutrazol or uniconazole doses increased up to 0.02 mg. However, doses of ≥0.02 mg had little additional effect on total plant height and leaf canopy height. Most of the total height control achieved by the use of PGRs was primarily due to a reduction of leaf canopy height, rather than inflorescence height. Doses of 0.005 to 0.01 mg of either PGR produced marketable sized potted plants of `Medallion Dark Red' and `Pink Satisfaction'. `Aurora', which was the most vigorous cultivar, required doses of 0.01 or 0.02 mg of either paclobutrazol or uniconazole to produce marketable sized potted plants.

Download Full-text

Quantifying Growth Control of Lantana Cultivars Varying in Vigor with Ancymidol, Flurprimidol, Paclobutrazol, and Uniconazole Substrate Drenches

HortTechnology ◽

10.21273/horttech.26.3.320 ◽

2016 ◽

Vol 26 (3) ◽

pp. 320-326

Author(s):

Christopher J. Currey ◽

Kellie J. Walters ◽

Kenneth G. McCabe

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Active Ingredient ◽

Plant Growth Regulator ◽

Growth Habit ◽

Growth Control ◽

Growth Index ◽

Plant Size ◽

Lantana Camara

Our objective was to quantify the efficacy of different plant growth regulator (PGR) substrate drenches on growth of lantana (Lantana camara) cultivars varying in growth habit. Rooted ‘Little Lucky Peach Glow’, ‘Lucky Peach’, and ‘Landmark Peach Sunrise’ lantana cuttings were individually planted into 4-inch-diameter containers filled with a commercial, soilless growing substrate. Fourteen days after planting, solutions containing 0 (control), 0.5, 1, 2, or 4 mg·L−1 ancymidol, flurprimidol, paclobutrazol, or uniconazole were applied to the surface of the growing substrate. Six weeks after applying PGR drenches, data were collected. The growth index (GI), an integrated measurement of plant size incorporating the height and widths of plants, was calculated. There was variation in the GI among the control plants, reflecting variation among cultivars within the species. In addition, we measured variation in activity among the different PGRs applied. Across the concentrations applied, ancymidol generally had the lowest activity across the four PGRs. For example, drenches containing 4 mg·L−1 ancymidol resulted in plants that were similar to plants treated with 0.5 to 1 mg·L−1 flurprimidol or uniconazole or 2 mg·L−1 paclobutrazol for ‘Lucky Peach’ lantana. Across all cultivars, flurprimidol and uniconazole had the greatest activity in suppressing plant height, width, and GI. Substrate drenches containing flurprimidol, paclobutrazol, or uniconazole are useful to control size of lantana produced in containers, though the recommended concentration depends on the active ingredient and the growth habit of cultivars being treated.

Download Full-text

Rainfall intensity and Mepiquat Chloride persistence in cotton

Scientia Agricola ◽

10.1590/s0103-90162007000200004 ◽

2007 ◽

Vol 64 (2) ◽

pp. 125-130 ◽

Cited By ~ 8

Author(s):

Fábio Suano de Souza ◽

Ciro Antonio Rosolem

Keyword(s):

Plant Growth ◽

Plant Height ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Dry Matter ◽

Rainfall Intensity ◽

Mepiquat Chloride ◽

Reproductive Structures ◽

Cotton Plants ◽

Dry Matter Weight

In some regions where cotton is grown in Brazil rainfall amounts to about 2,000 mm per year, which imposes a great risk for Mepiquat Chloride (MP) to be washed from cotton leaves before being absorbed. The objective of this research was to evaluate the MC persistence when applied on cotton plants submitted to different rain intensities after spraying. The treatments were three MC rates: 0, 15.0 and 30.0 g a.i. ha-1 and four simulated rainfalls, applied 90 minutes after MC spraying: 5, 10, 20 and 40 mm, plus a treatment without rain. Cotton plants of the cv. Delta Opal were grown in 12 L pots filled with an Haplortox. The experimental design was consisted of complete randomized blocks, in a factorial scheme, with four replicates. The evaluated parameters were: plant height, number of reproductive branches, dry matter weight, reproductive structures, retention and leaf area. The higher the rainfall the lower the effectiveness of the plant growth regulator in controlling plant height. A simulated rainfall as low as 5 mm occurring 90 minutes after MC application was enough to wash some of the plant growth regulator from cotton leaves.

Download Full-text

Aplikasi Zat Pengatur Tumbuh dengan Jumlah Daun Entres yang Berbeda terhadap Keberhasilan Sambung Pucuk Durian (Application of Plant Growth Regulator with Different Number of Scion Leaves on Success of Durian Top Grafting)

Jurnal Hortikultura ◽

10.21082/jhort.v30n2.2020.p125-132 ◽

2021 ◽

Vol 30 (2) ◽

pp. 125

Author(s):

Zulfa Rahmadita Nur Azizah ◽

Etik Wukir Tini ◽

Joko Maryanto

Keyword(s):

Plant Growth ◽

Factorial Design ◽

Research Design ◽

Growth Regulator ◽

Vegetative Propagation ◽

Plant Growth Regulator ◽

Coconut Water ◽

Pot Experiment ◽

Break Time ◽

Number Of Leaves

Perbanyakan tanaman secara vegetatif menggunakan teknik sambung pucuk dapat digunakan sebagai alternatif untuk menghasilkan benih yang bermutu. Namun, masalah yang sering terjadi pada sambung pucuk adalah kegagalan sambung. Penelitian ini bertujuan untuk mendapatkan jenis zat pengatur tumbuh, jumlah daun entres, dan kombinasi perlakuan yang memberikan hasil terbaik terhadap keberhasilan sambung pucuk durian. Penelitian dilaksanakan pada bulan November 2018 sampai Januari 2019 di Desa Alasmalang, Kemranjen, Banyumas. Percobaan yang dilakukan merupakan percobaan pot dengan rancangan faktorial. Perlakuan pada penelitian ini adalah kombinasi antara zat pengatur tumbuh (kontrol, ekstrak tauge, air kelapa, IBA, dan BAP) dan jumlah daun entres (2, 4, dan 6 helai). Rancangan penelitian yang digunakan yaitu Rancangan Acak Kelompok Lengkap dengan 15 perlakuan dan diulang tiga kali. Hasil penelitian menunjukkan perlakuan ZPT IBA dan BAP memberikan pengaruh nyata terhadap jumlah tunas sambung pucuk tanaman durian, yaitu sebesar 2,711 dan 2,822 dan perlakuan jumlah daun entres dua helai memberikan pengaruh yang nyata terhadap waktu pecah tunas, jumlah tunas, dan pertambahan jumlah daun sambung pucuk tanaman durian, yaitu sebesar 2,3 helai.KeywordsSambung pucuk durian; Daun entres; Zat pengatur tumbuhAbstractVegetative propagation of plants using shoot grafting can be used as an alternative to produce quality seeds. The problem that often occours in top grafting is the failure to graft. This experiment aims to obtain the type of plant growth regulator, the number of scion’s leaves, and the combination that give the best results for growth of top grafting in durian. The research was conducted in November 2018 to January 2019 in Alasmalang Village, Kemranjen, Banyumas. The experiment was a pot experiment with a factorial design. The treatment was a combination of growth regulator (control, bean extract, coconut water, IBA, and BAP) and number of scion leaves (2, 4, and 6 strands). The research design used was a RCBD with 15 treatments and three replications. The results showed that the treatment of PGR IBA and BAP had a significant effect on the number of grafted shoots of durian plants, namely 2.711 and 2.822 and the treatment of the number of leaves of two leaves had a significant effect on shoot break time, the number of shoots and the increase in the number of grafted leaves of durian plants, namely amounting to 2.3 strands.

Download Full-text