Abnormalities in vegetative and floral organs of Cola nitida caused by boron deficiency

Abnormalities in growth and development in C. nitida (Vent.) Schott and Endl. caused by boron deficiency are described. These include dieback of terminal shoots and the subsequent simultaneous development of many lateral branches, malformation of leaves, profuse flowering, increase in flower size, reduced fruit setting, parthenocarpic fruit development, and the preponderance of female flowers in the inflorescences. Visible deficiency symptoms did not appear when the boron content of the leaves was 15 ppm or more.

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PARTHENOCARPY IN THE CUCUMBER INDUCED BY SOME PLANT GROWTH-REGULATING CHEMICALS

Canadian Journal of Plant Science ◽

10.4141/cjps72-127 ◽

1972 ◽

Vol 52 (5) ◽

pp. 781-785 ◽

Cited By ~ 3

Author(s):

D. J. CANTLIFFE

Keyword(s):

Methyl Ester ◽

Plant Growth ◽

Growth Regulator ◽

Fruit Development ◽

Fruit Set ◽

The Other ◽

Parthenocarpic Fruit ◽

Cucumis Sativus L ◽

Pickling Cucumbers ◽

Female Flowers

Nine growth-regulating chemicals were sprayed at concentrations of 50 and 100 ppm on pickling cucumbers (Cucumis sativus L., cult Pioneer) in an effort to induce parthenocarpic fruit development. A morphactin formulation, IT 3456 (methyl-2-chloro-9-hydroxyfluorene-(9)-carboxylate), and TIBA (2,3,5-triiodobenzoic acid) were the most effective in stimulating parthenocarpic fruit-set and development at both concentrations used. Between six and seven fruits per plant were induced parthenocarpically when 100 ppm IT 3456 morphactin was used. Two other morphactins tested, IT 3233 (n-butyl-9-hydroxyfluorene-(9)-carboxylate) and Bay 102614 (2,7-dichloro-9-hydroxyfluorene-carboxylate-(9)-methyl ester), produced no more fruits than the control. A new growth regulator, CCDP (3-carboxy-1-(p-chlorophenyl)-4,6-dimethyl-2-pridone), significantly increased the number of fruits per plant at the 100-ppm concentration, and also increased the number of female flowers per plant produced within 50 days of planting, at both concentrations. The other four compounds tested, designated EL 531 (α-cycloprophyl-α-(4-methoxyphenyl)-5-pyrimidine methanol), BAS 0660-W (N-dimethyl-morpholiniumchloride), TD 692 (mono-("coco" dimethylamine) succinate), and Chemagro 8728 (5-chloro-2-thenyl-tributylphosphonium), were not effective inducers of parthenocarpy in the cucumber.

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Effect of borax application on young coconut palms

CORD ◽

10.37833/cord.v21i02.404 ◽

2005 ◽

Vol 21 (02) ◽

pp. 34

Author(s):

P.G. Kamalakshiamma ◽

M. Shanavas ◽

D. Prema ◽

Jacob Mathew

Keyword(s):

Boron Content ◽

Growth Parameters ◽

Boron Deficiency ◽

Leaf Production ◽

Stunted Growth ◽

Deficiency Symptoms ◽

Leaf Tissues ◽

Plantation Crops ◽

Different Levels ◽

Different Doses

There is increasing incidence of boron deficiency in coconut palms in the root (wilt) affected tract in the southern districts of Kerala, India. An earlier survey in this tract indicated that 19-25% of the palms had boron deficiency symptoms. The symptoms manifested due to boron deficiency in coconut palms include malformations in leaves as well as in the nuts resulting in stunted growth and low productivity. A field experiment was conducted at Central Plantation Crops Research Institute, Kayamkulam to study the effect of different doses of boron on deficiency symptoms and the nutrition of coconut seedlings. The results revealed that the seedlings which had boron deficiency symptoms showed recovery with the boron application. Among the different levels of borax (Na2B4O7.10H2O) tried on coconut seedlings, application of 300 g borax per seedling per year in two equal splits was found effective to achieve recovery and to improve the growth of the young seedlings. The seedlings treated with borax showed improvement in growth parameters such as girth at collar, annual leaf production and total functional leaves and boron content in leaf tissues.

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Compared boron uptake and translocation in cotton cultivars

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832012000500014 ◽

2012 ◽

Vol 36 (5) ◽

pp. 1499-1506 ◽

Cited By ~ 4

Author(s):

Júlio César Bogiani ◽

Ciro Antônio Rosolem

Keyword(s):

Plant Growth ◽

Nutrient Solution ◽

Growth And Development ◽

The Other ◽

Boron Deficiency ◽

Boron Uptake ◽

Plant Growth And Development ◽

Deficiency Symptoms ◽

B Uptake ◽

Boron Uptake And Translocation

The mobility of boron (B), a commonly deficient micronutrient in cotton, has been shown to be low in the plant phloem. Nevertheless, studies have indicated that cotton cultivars can respond differently to B application. A greenhouse experiment was conducted to compare B absorption and mobility in cotton cultivars grown in nutrient solution. Treatments consisted of three cotton cultivars (FMT 701, DP 604BG and FMX 993), and five B rates (0.0, 2.5, 5.0, 10.0, and 20.0 µmol L-1). Plant growth and development were monitored for four weeks from the appearance of the first square. The time of onset and severity of B deficiency symptoms varied among cotton cultivars. Initial B uptake of cv. DP 604BG was lower than of the other cultivars, but a greater amount of available B in the nutrient solution was required to prevent deficiency symptoms in this cultivar. Boron deficiency impairs cotton growth, with no differences among cultivars, regardless of the time of appearance and intensity of B deficiency symptoms.

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Forchlorfenuron Application Induced Parthenocarpic Fruit Formation without Affecting Fruit Quality of Cucumber

Horticulturae ◽

10.3390/horticulturae7060128 ◽

2021 ◽

Vol 7 (6) ◽

pp. 128

Author(s):

Li Su ◽

Miaoqing Wang ◽

Yuean Wang ◽

Rahat Sharif ◽

Nannan Ren ◽

...

Keyword(s):

Plant Growth Regulator ◽

Nutritional Quality ◽

Fruit Set ◽

Total Flavonoids ◽

Parthenocarpic Fruit ◽

Fruit Setting ◽

Major Nutrients ◽

Fruit Formation ◽

Female Flowers

The plant growth regulator forchlorfenuron is often applied to promote fruit setting and development in cucumber production. However, the effect of forchlorfenuron on the appearance and nutritional quality of cucumber is unknown. In the present study, forchlorfenuron was applied to female flowers 1 day before anthesis and at the day of anthesis. The application of forchlorfenuron successfully induced parthenocarpic fruit formation in cucumber. In addition, cytokinin-responsive genes were upregulated under forchlorfenuron treatment. Fruit treated with forchlorfenuron did not differ from pollinated fruit in shape, texture and major nutrients, such as protein, total flavonoids and vitamin C, with the exception of the lower phenolic acid content. Overall, our finding suggests that forchlorfenuron could be vital in promoting the parthenocarpic fruit set without altering the quality of cucumber.

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APPLICATION RESULTS OF CUCUMBER GRAFTING ON DIFFERENT ROOTSTOSKS OF PUMPKIN

VEGETABLE CROPS OF RUSSIA ◽

10.18619/2072-9146-2018-6-31-33 ◽

2018 ◽

pp. 31-33

Author(s):

G. S. Martirosyan

Keyword(s):

Vitamin C ◽

Total Yield ◽

Growth Conditions ◽

Summer Period ◽

High Increase ◽

Fruit Setting ◽

The World ◽

Growth Development ◽

Fruit Mass ◽

Female Flowers

At present it is very actual in vegetable growing the development of highly effective and ecologically safe methods for increasing yields and plant resistance to unfavorable growth conditions. One of these methods is grafting. The goal of the study was to learn the influence of the rootstock on the characteristics of the growth, development and yield of cucumber. Research was conducted in 2015-2016 in greenhouse in spring-summer period in Armenia. As a scions was used cucumber variety Nazrvan, which was grafted on 5 pumpkin rootstocks (VI033637, VI03338, VI03364, VI040903, VI056328) from the collection of the World Vegetable Center (WVC). The grafting was carried out according to the standard method. When the VI033637 rootstock was used, flowering started 5 days earlier than the ungrafted plants, while when grafted on VI040903, the fruits ripened 6.2 days earlier. High increase of early yield (33.3%) received when used both above mentioned rootstocks. VI033638 – 4.1 kg/m2 and VI033664- 9.9 kg/m2 samples provided high increase of the total yield. For all the types of rootstocks the grafted plants of cucumber surpass the non-grafted ones by height from 4.7 % to 21.7%, by marketability of fruits from 5% to 14% and by fruit mass from 15 gr to 45 g. At the beginning of fruit-setting of cucumber plants the number of female flowers increased from 27% to 63% depending on the rootstock sample. The amount of dry substances in all grafted plants has increased by 4.4-8.8% and the amount of vitamin C by 1.8-9.2%. As a result of research carried out by us, perspective rootstocks (VIO33638 and VIO33664) are identified by a set of economically valuable characteristics which are recommended for applying in the further investigation and breeding activities and in production of grafted plants.

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`Mauritius' Lychee Fruit Development and Reduced Abscission after Treatment with the Auxin 2,4,5-TP

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.120.1.65 ◽

1995 ◽

Vol 120 (1) ◽

pp. 65-70 ◽

Cited By ~ 16

Author(s):

R.A. Stern ◽

J. Kigel ◽

E. Tomer ◽

S. Gazit

Keyword(s):

Propionic Acid ◽

Fruit Development ◽

Commercial Product ◽

Initial Number ◽

Litchi Chinensis ◽

Lag Period ◽

Marketable Fruit ◽

Second Wave ◽

Second Period ◽

Female Flowers

Fruit development and abscission in `Mauritius' lychee (Litchi chinensis Sonn.) were studied over three consecutive seasons. Each season, two distinct abscission periods were observed. The first started at the end of full female bloom and continued for ≈ 4 weeks. Of the initial number of female flowers, 85 % to 90 % abscised during this period. The second period began after a lag period of≈ 1 week and lasted ≈ 2 weeks. About half of the remaining fruitlets abscised during this wave. AU of these fruitlets contained an embryo. The second wave coincided with a period of rapid embryo growth and endosperm loss. Tipimon (a commercial product containing the triethanolamine salt of the synthetic auxin 2,4,5-TP) consistently and significantly increased marketable fruit yield when applied between the two abscission periods. Chemical name used: 2,4,5 -trichlorophenoxy propionic acid (2,4,5 -TP).

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