863 PB 542 SENSITIVITY OF ARTEMISININ YIELD FROM SWEET WORMWOOD (ARTEMISIA ANNUA) TO CHANGES IN CULTURAL PRACTICES

Sweet worm wood is a source of the anti-malarial plant secondary compound artemisinin. The effects of water stress, nitrogen rates, plant growth regulators, and harvest timing on vegetative growth and yield of artemisinin were tested in separate experiments. In the harvest timing trial, total biomass, leaf yield, leaf artemisinin content and total artemisinin yield increased during the season. The wettest treatment tested decreased the total plant dry to fresh weight ratio, but had no effect on height, total biomass, leaf yield, leaf artemisinin content and artemisinin yield. Nitrogen fertilization increased plant height, but had no effect on total biomass, leaf yield, leaf artemisinin content and artemisinin yield. The plant growth regulators decreased plant height, increased total biomass, but had no effect on leaf yield, leaf artemisinin content and artemisinin yield. The effects of chemical weed control and post-harvest leaf drying will also be discussed.

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Pengaruh Naungan dan Zat Pengatur Tumbuh terhadap Pertumbuhan dan Hasil Tanaman Kentang Kultivar Atlantik di Dataran Medium

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) ◽

10.24831/jai.v44i1.12489 ◽

2016 ◽

Vol 44 (1) ◽

pp. 33 ◽

Cited By ~ 2

Author(s):

Jajang Sauman Hamdani ◽

Sumadi , ◽

Yayat Rochayat Suriadinata ◽

Lourenco Martins

Keyword(s):

Plant Growth ◽

Plant Height ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Choline Chloride ◽

Potato Cultivar ◽

Growth And Yield ◽

Tuber Weight ◽

Corn Plant ◽

Area Index

ABSTRACT<br /><br />Use of shade on the cultivation of potato in medium altitude is expected to reduce both light intensity and temperature, and therefore is more suitable for potatoes to grow in medium altitude. While the use of growth regulators subtances improving the process of assimilate distribution from the leaves to the tuber. Therefore use of shade followed by plant growth regulators applications are expected to increase of growth and yield. The objectives of the experiment were to determine growth and yield of potato cultivar Atlantik grown at medium altitude with different types of shading and plant growth regulators. The experiment was conducted at an experimental station of the Faculty of Agriculture, Padjadjaran University, Jatinangor, Sumedang, at an altitude 685 m asl. The experiment was arranged in a split plot design consisting of two factors and three replications. The main plots were types of shading (without shading, paranet 45%, UV polyethylene, and corn plant) and the sub plots were combination of plant growth regulators (benzylaminopurine + paclobutrazol), (benzylaminopurine +chloro choline chloride), benzylaminopurine, paclobutrazol, chloro choline chloride). The results showed that the effect of interaction between shading and plant growth regulator on growth and yield of the potato were not significant. Paranet shade and corn plant shade increased plant height, leaf area index, tuber weight per plant, yield per hectar and tuber grade A of potato cultivar Atlantik. Corn plant shading gave potato yield 21.6 ton ha-1 with 64% grade A tuber. Paclobutrazol decreased potato plant height, but increased number of tuber per plant and yielded highest tuber weight of 702.1 per plant (23.3 ton ha-1 ), with 70.9% grade A tuber. <br /><br />Keywords: Benzylaminopurine, microclimate, paclobutrazol, temperature

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Plant growth regulators promote growth and yield of summer tomato (lycopersicone sculentum Mill.)

Progressive Agriculture ◽

10.3329/pa.v26i1.24512 ◽

2015 ◽

Vol 26 (1) ◽

pp. 32-37 ◽

Cited By ~ 3

Author(s):

M Rahman ◽

MA Nahar ◽

MS Sahariar ◽

MR Karim

Keyword(s):

Plant Growth ◽

Plant Height ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Growth Regulator ◽

Plant Growth Regulator ◽

Fruit Weight ◽

Fruit Yield ◽

Growth And Yield ◽

The Impact

An experiment was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh to test the impact of plant growth regulators on growth and yield of summer tomato. The experiment consisted of two tomato varieties viz. BARI Hybrid Tomato-4 and BARI Hybrid Tomato-8 and four types of plant growth regulator (PGR)viz.,(i) control (without PGR), (ii) 4-CPA (4-chlorophenoxy acetic acid), GA3 (gibberellic acid) and 4-CPA +GA3. The two-factor experiment was laid out in randomized complete block design with three replications. The results of the experiment revealed that significant variations were observed for most of the characters studied. At 75 DAT, the tallest plant (79.35 cm), number of flowers and fruits (38.11 and 19.04, respectively) plant-1, individual weight (58.44 g) and fruit yield (22.75 t ha-1) were found in BARI Hybrid Tomato-8.At 75 DAT the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.9, respectively) plant-1, individual fruit weight (61.16 g), and fruit yield (27.28 tha-1) were found when 4-CPA + GA3 applied together, whereas the minimum for these characters were recorded from control plants. In case of combined effect of variety and plant growth regulator, the maximum plant height (87.90 cm), number of flowers and fruits (49.04 and 21.91, respectively) plant-1, individual fruit weight (61.16 g) and fruit yield (27.28 t ha-1) were observed in BARI Hybrid Tomato-8 when treated with 4-CPA + GA3together, and the minimum for all these parameters were found in control plants. The results of the present study suggest thatboth 4-CAP and GA3together can be practiced for increasing summer tomato production for both the varieties.Progressive Agriculture 26:32-37, 2015

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Effects of plant growth regulators on growth and yield of pre-basic seed potato production under glasshouse condition

SAARC Journal of Agriculture ◽

10.3329/sja.v15i1.33161 ◽

2017 ◽

Vol 15 (1) ◽

pp. 149-160 ◽

Cited By ~ 1

Author(s):

P Bhattarai

Keyword(s):

Plant Growth ◽

Plant Height ◽

Plant Growth Regulators ◽

Seed Potato ◽

Growth Regulators ◽

Potato Production ◽

Growth And Yield ◽

Seed Potato Production ◽

Chlormequat Chloride ◽

Basic Seed

A glasshouse experiment was carried out to study the effect of Plant Growth Regulators (PGRs) on the production of pre-basic seed (PBS) potatoes, cv. Janakdev at Khumaltar, (1360 masl) Lalitpur, Nepal during autumn and spring seasons of 2014 and 2015 respectively. Four - week old virus free in vitro plantlets grown in tissue culture laboratory were planted with 20 cm distance between rows and 10 cm between plantlets under glasshouse in completely randomized design. Three growth regulators, paclobutrazol (50 ppm), daminozide (100 ppm), chlormequat chloride (Cycocel) (200 ppm) and simple water as control were used for single foliar spray 6 weeks after transplanting with four replications. Analysis showed that there were significant differences on growth parameters; plant survival, plant uniformity, plant height and yield components; number of minitubers per plant and per square meter in both the seasons. Significantly maximum number of potato minitubers was recorded in growth retardants treated plants as compared to control. Experimental results showed that maximum number of minituber (22.9/plant and 668.2/m2) in autumn and (23.7/plant and 1185.0/m2) in spring season were gained from paclobutrazole spray, which were statistically differed from those of other growth regulators and control. Plants without PGR and treated with daminozide produced the least amount of minituber per unit area. Plant height decreased in all growth regulators over control due to their inhibiting effect on growth of the plants. paclobutrazol significantly reduced plant height but produced larger and heavier minitubers compared to other treatments. Hence, the best PGR for optimum enhancement of minituber number and size was paclobutrazol. The results suggested that paclobutrazol could be used in pre-basic seed potato production, leading to maximum minituber production which ultimately gave higher returns. The study concluded that spraying growth retarding chemicals at grand growth stage checked the excessive vegetative growth and increased the number and size of minituber.SAARC J. Agri., 15(1): 149-160 (2017)

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