scholarly journals Promotion of the Formation of Flower Bud in Tea Plants by Plant Growth Regulators.

1993 ◽  
pp. 1-9
Author(s):  
Yoshiyuki TAKEDA ◽  
Kosei WADA ◽  
Atsushi NESUMI
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Flower Bud ◽  
Tea Plants

The effect of foliar application of five plant growth regulators on the growth and yield of lowbush blueberry

1993 ◽  
Vol 73 (2) ◽  
pp. 607-610 ◽  
Author(s):  
John C. Lewis ◽  
Hak-Yoon Ju
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Growth And Yield ◽  
Yield Response ◽  
Flower Bud ◽  
Chlormequat Chloride ◽  
Vaccinium Angustifolium ◽  
Lowbush Blueberry

The plant growth regulators, daminozide (2500 ppm), chlormequat chloride (1500 ppm), ethephon (500 ppm), mepiquat chloride (100 ppm), and paclobutrazol (1000 ppm), were foliar applied to sprouting-year and to first fruiting-year commercial lowbush blueberry (Vaccinium angustifolium Ait.). In sprouting-year blueberry, flower bud production was increased by paclobutrazol, resulting in significantly improved bloom and yield the following year. In fruiting-year blueberry, flower bud production was significantly increased by paclobutrazol in the year of application and resulted in improved bloom and yield in the following fruiting year. The effects of the other treatments on these parameters were in most cases not significant. Daminozide showed a significant bloom response with a sprouting-year application, but this did not translate into a yield response. Key words: Vaccinium angustifolium, plant growth regulators, paclobutrazol, flower bud production

scholarly journals Use of Plant Growth Regulators for Feathering and Flower Suppression of Apple Nursery Trees

HortScience ◽  
2017 ◽  
Vol 52 (8) ◽  
pp. 1080-1091 ◽  
Author(s):  
Jaume Lordan ◽  
Terence L. Robinson ◽  
Mario Miranda Sazo ◽  
Win Cowgill ◽  
Brent L. Black ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Fire Blight ◽  
Tree Height ◽  
Late Summer ◽  
Flower Bud ◽  
Quality Ratings ◽  
Nursery Trees ◽  
Tree Quality

The use of highly feathered trees can make high-density apple plantings more profitable through enhanced precocity and increased early yield. Currently, nurseries are asked to provide highly feathered trees with wide branch crotch angles. The use of plant growth regulators (PGRs) can play a key role when it comes to branch induction; however, dose and timing both need to be tested to enhance branching without compromising other tree quality attributes. Over the last 4 years, we have conducted studies of the use of MaxCel® (6-benzyladenine) and Promalin® (a mixture of 1.8% 6-benzyladenine and 1.8% GA4+7) in comparison with Tiberon™ SC (cyclanilide) at several nurseries in NY, WA, DE, Ontario (Canada), and Chile. The best results were obtained with four applications of MaxCel® or Promalin® (400 mg·L−1) beginning when leader growth reached 70 cm above the soil line and reapplied at 10–14 days intervals. Promalin® was a slightly less effective branching agent than MaxCel®. On the other hand, Promalin® stimulated leader growth resulting in improved final tree height, whereas MaxCel® induced the widest branch angles. Overall, we observed good response and quality ratings with ‘Cameo’, ‘Cripps Pink’, ‘Enterprise’, ‘Fuji’, ‘Ambrosia’, ‘Crimson Crisp’, ‘Gingergold’, and ‘Granny Smith’, whereas less quality ratings were observed on ‘Ambrosia’, ‘Cortland’, ‘Goldrush’, ‘Honeycrisp’, and ‘Suncrisp’. Response with ‘Gala’ varied depending on the temperature range. Multiple sprays of Gibberellins (GA4+7, or GA3) at 250 mg·L−1 applied to nursery trees in the late summer inhibited flower bud development and flowering in the orchard the next year. This reduces the risk of fire blight infection in newly planted trees.

scholarly journals RESPONSE OF PLANT GROWTH REGULATORS ON THE GROWTH, FLOWERING AND YIELD ATTRIBUTES OF AFRICAN MARIGOLD (TAGETES ERECTA. L)

2021 ◽  
Vol 21 (no 1) ◽  
Author(s):  
Kousika. S ◽  
Ajish Muraleedharan ◽  
K. Sha ◽  
P.K. karthikeyan ◽  
C. Praveen Sampath Kumar ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Foliar Application ◽  
Block Design ◽  
Tagetes Erecta ◽  
Herbaceous Plant ◽  
Flower Bud ◽  
Yield Attributes ◽  
African Marigold

Tagetes is a genus of annual, perennial or herbaceous plant in the family Asteraceae. Most of the species have pinnate green leaves. Blooms are naturally occurring in golden, orangeyellow, and white colour, often with maroon highlights. Floral heads are 4 to 6 cm in diameter, generally with both ray florets and disc florets. The present study was conducted at the post graduate research laboratory at Department of Horticulture, Faculty of Agriculture, Annamalai University to find out the “Effect of plant growth regulators on flowering and yield of African marigold (Tagetes erecta Linn)”. The experiment was laid out in Randomized Block Design with three replications. There were ten treatments, viz., GA3 100 ppm, GA3 200 ppm and GA3 300 ppm, NAA 100 ppm, NAA 200 ppm, NAA 300 ppm, Ethrel 50 ppm, Ethrel 100 ppm, and Ethrel 150 ppm and control. Among the growth regulators tried, GA3 200 ppm as foliar application on 30 and 60 days after transplanting registered the highest values for plant characters like plant height (47.1 cm), number of branches ( 35.1), days taken to first flower bud appearance (39.3 days), days taken to flower opening (37.6 days), longevity of flower (11.17 days), stalk length (12.1 cm), diameter of flower (7.8 cm), number of flowers per plant (40.3), weight of the single flower (9.1 g), yield of flowers per plant (337 g) and flower yield per plot (11.1 kg). From the present study, it is recommended that spraying of GA3 200 ppm on 30 and 60 days after transplanting improved yield and quality of African marigold flowers.

scholarly journals Roles of plant growth regulators on flowering of rose (Rosa hybrida L.’Red Rose’)

2021 ◽  
Vol 947 (1) ◽  
pp. 012039
Author(s):  
Linh Tran Minh Hong ◽  
Tu Cam Trinh ◽  
Viet Trang Bui ◽  
Huong Thanh Tran
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Rosa Hybrida ◽  
Floral Meristem ◽  
Flower Bud ◽  
Meristem Cell

Abstract Rose is the most popular ornamental flower all over the world, which is used as garden plants and cut flowers. In the case of Rosa hybrida L. ’Red Rose’, flowering provides the major developmental transition from the vegetative to the reproductive stage, and reproduction is one of the most important phases in an organism’s life cycle. In this study, the morphological and physiological changes during the flower development of rose, which is planted in the garden, and roles of plant growth regulators on the flowering of in vitro vegetative shoots of rose were analyzed. The development of a flower includes three stages: the shoot apical meristem, floral meristem, floral bud. Levels of cytokinin, auxins, and gibberellins increased in the transition of meristem from the shoot apical meristem to the floral meristem stage. Plant growth regulators have important effects on the shoot apical meristem cell division and flowering. The combination of 0.5 mg.L−1 GA3, 0.1 mg.L−1 NAA, 2.5 or 3.0 mg.L−1 BA to Murashige and Skoog (MS) medium induces the floral transition of the in vitro vegetative shoots with the highest percentage (41%) as well as growth and development in comparison to the other treatments after 10 weeks. Then, the in vitro floral meristem continuously developed into a flower bud after 12 weeks.

scholarly journals STUDY ON FACTORS AFFECTING THE FLOWERING OF FORGET-ME-NOT (Browallia americana L.) IN VITRO CULTURE

2020 ◽  
Vol 1 (40) ◽  
pp. 13-27
Author(s):  
Linh Thi Thuy Le ◽  
Thuong Tieu Linh Tran ◽  
Hung Duc Le ◽  
Dien Huynh Han ◽  
Thy Thi Bich Le ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Great Influence ◽  
Basic Research ◽  
Flower Buds ◽  
Flower Bud ◽  
Factors Affecting ◽  
Flowering Rate

Vegetative to reproductive transition depends on different factors. This study was conducted to examine factors affecting the growth and flowering of Browallia americana L. in vitro such as the age of the sample, mineral content, plant growth regulators, concentration and type of sugar, ventilation culture. The results showed that 40-day-old shoots were a suitable source of in vitro flowering (90.85% after 45 days of culture). Mineralcontent had a great influence on the ability to differentiate flower buds of plants, the highest in Murashige and Skoog medium (87.22% after 45 days of culture). Meanwhile, most of the plant growth regulators which were surveyed in this study inhibited the flowering. In particular, culture medium with glucose showed higher flowering efficiency than saccharose, the highest flowering rate was at 50 mg/L glucoses (90.52%, with 3.50 flower buds/explant after 30 days of culture). In addition, ventilation culture, which used plastic wrapedwith milipore filter had the highest rate of flower bud formation (average 3.58 flower buds/plant). This result is an important foundation for studying the flowering of in vitro plant culture, which will be one of the great paradigm plants for teaching and basic research.

scholarly journals Analysis of the Mechanism of Flower Bud Formation in Arabidopsis thaliana by Plant Growth Regulators.

1993 ◽  
Vol 67 (2) ◽  
pp. 160-164
Author(s):  
Junichi UEDA ◽  
Kiyotaka OKADA ◽  
Masako K.KOMAKI ◽  
Jiro KATO ◽  
Yoshiro SHIMURA
Keyword(s):  
Arabidopsis Thaliana ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Flower Bud ◽  
Bud Formation ◽  
Flower Bud Formation
Sign in / Sign up

Export Citation Format

Share Document