scholarly journals Photochemistry and gas exchange in cold conditions in Zn-deficient red cabbage (Brassica oleracea L. var. capitata f. rubra) plants

2012 ◽  
Vol 24 (1) ◽  
pp. 3-11
Author(s):  
Roghieh Hajiboland ◽  
Fahimeh Amirazad
Keyword(s):  
Gas Exchange ◽  
Brassica Oleracea ◽  
Low Temperatures ◽  
Soluble Sugars ◽  
Cold Treatment ◽  
Soluble Carbohydrates ◽  
Shoot Biomass ◽  
Zn Deficiency ◽  
Ps Ii ◽  
Red Cabbage

Photochemistry and gas exchange in cold conditions in Zn-deficient red cabbage (Brassica oleraceaL. var.capitataf.rubra) plantsThe responses of red cabbage (Brassica oleraceaL. var.capitataf.rubra) plants to a low Zn supply and cold conditions (10°/7°C day/night temperature) were investigated in a hydroponic growing medium. A low Zn supply caused a significant reduction of shoot and root dry weight - up to 55% and 45% for the control and 62% and 52% for cold-treated plants, respectively. The total soluble carbohydrates and starch declined in Zn-deficient plants. Exposure to low temperatures, however, led to a decline in starch but an increase in soluble sugars. In Zn-sufficient plants, low temperatures increased the excitation capture efficiency of open photosystem II (PS II) reaction centres (RCs) (F'v/F'm), the quantum yield of PS II (ΦPSII), the electron transport rate (ETR) and the proportion of active chlorophyll associated with the RCs of PS II (Fv/F0). Low temperatures did not affect net CO2uptake in Zn-sufficient plants, though a reduction of stomatal conductance occurred. The results demonstrated that although cold-treated plants were slightly more susceptible to Zn deficiency, cold treatment caused greater shoot biomass (up to 32%) in plants supplied with adequate Zn. The adaptation of red cabbage plants to cold conditions is attributable to improved photochemical events in the leaves, a maintenance of the net CO2assimilation rate, lower water loss and the accumulation of anthocyanins as antioxidants.

scholarly journals Growth, photosynthesis and antioxidant defense systém in Zn-deficient red cabbage plants

2010 ◽  
Vol 56 (No. 5) ◽  
pp. 209-217 ◽  
Author(s):  
R. Hajiboland ◽  
F. Amirazad
Keyword(s):  
Superoxide Dismutase ◽  
Chlorophyll A ◽  
Antioxidant Defense ◽  
Soluble Carbohydrates ◽  
Zn Deficiency ◽  
Lower Sensitivity ◽  
Chlorophyll Fluorescence Parameters ◽  
Red Cabbage ◽  
Malondialdehyde Content ◽  
Reduction Of Co2

The effect of Zn deficiency was studied in red cabbage (Brassica oleracea L. var. capitata f. rubra) plants grown in nutrient solution under controlled environmental conditions. Zinc starvation affected the number (61%), surface area (72%) and biomass (62%) of leaves more than root biomass (42%). Although chlorophyll fluorescence parameters revealed occurrence of photoinhibition following declined stomatal conductance and reduction of CO2 available at carboxylation sites, photosynthesis apparatus was not damaged seriously under Zn deficiency conditions. Chlorophyll a, chlorophyll a/b ratio, soluble carbohydrates and starch declined but anthocyanins and free phenolics were accumulated under Zn deficiency conditions. Activity of ascorbate peroxidase, catalase and peroxidase enhanced under Zn deficiency conditions, whereas activity of superoxide dismutase declined in leaves but not in roots of Zn-deficient plants. Maintenance of superoxide dismutase activity and malondialdehyde content in roots demonstrated that roots were more protected against reactive oxygen species imbalance under Zn deficiency conditions compared with leaves that was correlated well with the lower sensitivity of roots to low Zn supply.

scholarly journals Changes in soluble carbohydrates during storage of Caesalpinia echinata LAM. (Brazilwood) seeds, an endangered leguminous tree from the Brazilian Atlantic Forest

2006 ◽  
Vol 66 (2b) ◽  
pp. 739-745 ◽  
Author(s):  
I. S. Garcia ◽  
A. Souza ◽  
C. J. Barbedo ◽  
S. M. C. Dietrich ◽  
R. C. L. Figueiredo-Ribeiro
Keyword(s):  
Low Temperatures ◽  
Soluble Sugars ◽  
Dry Weight ◽  
Soluble Carbohydrates ◽  
Leguminous Tree ◽  
Neutral Sugars ◽  
Main Tendency ◽  
Low Levels ◽  
Caesalpinia Echinata ◽  
Seed Storability

Caesalpinia echinata seeds stored in laboratory environmental conditions lose their viability in one month whilst under low temperatures germination is maintained for 18 months of storage. These seeds are tolerant to desiccation, keeping their viability up to 0.08 gH2O.gDW-1. Since soluble carbohydrates are believed to be involved with desiccation tolerance and seed storability, the aim of this work is to analyze the content and composition of soluble carbohydrates in C. echinata seeds during storage in paper bags (PB) and glass flasks (GF) at laboratory room (RT) and cool (CT) temperatures. In freshly harvested seeds, total soluble carbohydrates comprised approximately 10% of the dry weight, decreasing to ca. 8% over 18 months of storage at RT. In seeds stored at CT, sugars varied differently decreasing initially and being restored at the end of the analysis period. The main neutral sugars in seeds from all treatments were sucrose, fructose and glucose. Raffinose and stachyose were present as traces. Free myo-inositol and other cyclitols were also detected. The main tendency observed was the variation in levels of both glucose and fructose in relation to sucrose, the highest levels of monosaccharides which were found in seeds stored at CT. The values of glucose and fructose were practically constant in seeds stored in paper bags for 18 months at CT, decreasing consistently in the other treatments, mainly at RT. Sucrose contents remained relatively stable. Changes in soluble sugars during storage suggest that the loss of germinability of seeds of C. echinata could be associated with low levels of glucose and fructose in relation to sucrose.

scholarly journals Effects of Root Temperature on the Plant Growth and Food Quality of Chinese Broccoli (Brassica oleracea var. alboglabra Bailey)

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 702 ◽  
Author(s):  
Fang He ◽  
Björn Thiele ◽  
Sharin Santhiraraja-Abresch ◽  
Michelle Watt ◽  
Thorsten Kraska ◽  
...  
Keyword(s):  
Plant Growth ◽  
Brassica Oleracea ◽  
Food Quality ◽  
Negative Impact ◽  
Soluble Sugars ◽  
Shoot Biomass ◽  
Total Chlorophyll ◽  
Root Temperature ◽  
Stems And Leaves

Root temperature has long been considered an essential environmental factor influencing the plant’s physiology. However, little is known about the effect of root temperature on the quality of the food produced by the plant, especially that of horticultural crops. To fill this gap, two independent root cooling experiments (15 °C vs. 20 °C and 10 °C vs. 20 °C) were conducted in autumn 2017 and spring 2018 in hydroponics with Chinese broccoli (Brassica oleracea var. alboglabra Bailey) under greenhouse conditions. The aim was to investigate the effect of root temperature on plant growth (biomass, height, yield) and food quality (soluble sugars, total chlorophyll, starch, minerals, glucosinolates). A negative impact on shoot growth parameters (yield, shoot biomass) was detected by lowering the root temperature to 10 °C. Chinese broccoli showed no response to 15 °C root temperature, except for an increase in root biomass. Low root temperature was in general associated with a higher concentration of soluble sugars and total chlorophyll, but lower mineral levels in stems and leaves. Ten individual glucosinolates were identified in the stems and leaves, including six aliphatic and four indolic glucosinolates. Increased levels of neoglucobrassicin in leaves tracked root cooling more closely in both experiments. Reduction of root temperature by cooling could be a potential method to improve certain quality characters of Chinese broccoli, including sugar and glucosinolate levels, although at the expense of shoot biomass.

Response of durum wheat to different levels of zinc and Fusarium pseudograminearum

2014 ◽  
Vol 65 (1) ◽  
pp. 61 ◽  
Author(s):  
Mohsin S. Al-Fahdawi ◽  
Jason A. Able ◽  
Margaret Evans ◽  
Amanda J. Able
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Sufficient Conditions ◽  
Crown Rot ◽  
Limiting Factors ◽  
Shoot Biomass ◽  
Zn Deficiency ◽  
Zinc Efficiency ◽  
Fusarium Pseudograminearum ◽  
Zn Concentration

Durum wheat (Triticum turgidum ssp. durum) is susceptible to Fusarium pseudograminearum and sensitive to zinc (Zn) deficiency in Australian soils. However, little is known about the interaction between these two potentially yield-limiting factors, especially for Australian durum varieties. The critical Zn concentration (concentration of Zn in the plant when there is a 10% reduction in yield) and degree of susceptibility to F. pseudograminearum was therefore determined for five Australian durum varieties (Yawa, Hyperno, Tjilkuri, WID802, UAD1153303). Critical Zn concentration averaged 24.6 mg kg–1 for all durum varieties but differed for the individual varieties (mg kg–1: Yawa, 21.7; Hyperno, 22.7; Tjilkuri, 24.1; WID802, 24.8; UAD1153303, 28.7). Zinc efficiency also varied amongst genotypes (39–52%). However, Zn utilisation was similar amongst genotypes under Zn-deficient or Zn-sufficient conditions (0.51–0.59 and 0.017–0.022 g DM μg–1 Zn, respectively). All varieties were susceptible to F. pseudograminearum but the development of symptoms and detrimental effect on shoot biomass and grain yield were significantly greater in Tjilkuri. Even though crown rot symptoms may still be present, the supply of adequate Zn in the soil helped to maintain biomass and grain yield in all durum varieties. However, the extent to which durum varieties were protected from plant growth penalties due to crown rot by Zn treatment was genotype-dependent.

scholarly journals Antioxidant Enzyme Activities of some Brassica Species

2017 ◽  
Vol 74 (2) ◽  
pp. 191
Author(s):  
Rodica SOARE ◽  
Maria DINU ◽  
Cristina BĂBEANU ◽  
Mihaela POPESCU
Keyword(s):  
Antioxidant Activity ◽  
Superoxide Dismutase ◽  
Enzymatic Activity ◽  
Brassica Oleracea ◽  
Radical Cation ◽  
Colorimetric Method ◽  
Antioxidant Enzyme Activities ◽  
Red Cabbage ◽  
Soluble Peroxidase ◽  
Brassica Oleracea L

This paper set out to comparatively study five species: white cabbage (Brassica oleracea L. var. capitata alba Alef.), red cabbage (Brassica oleracea L. var. capitata f. rubra Alef.), Kale (Brassica oleracea L. var. Acephala), cauliflower (Brassica oleracea var. botrytis) and broccoli (Brassica oleracea var. cymosa) in order to identify those with high enzymatic and antioxidant activities. The enzymatic activity of superoxide dismutase (SOD), catalase (CAT) and soluble peroxidase (POX) as well as the antioxidant activity against 2.2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical cation were determined. Total superoxide dismutase activity was measured spectrophotometrically based on inhibition in the photochemical reduction of nitroblue tetrazolium. Total soluble peroxidase was assayed by measuring the increase in A436 due to the guaiacol oxidation and the catalase activity was assayed through the colorimetric method. The capacity of extracts to scavenge the ABTS radical cation was assessed colorimetric using Trolox as a standard. The obtained results show that studied enzymatic activities and the antioxidant activity against ABTS vary depending on the analyzed species. So, among the studied Brassicaceae species, it emphasize red cabbage with the highest enzymatic activity (CAT 22.54 mM H2O2/min/g and POX 187.2 mM ΔA/1min/1g f.w.) and kale with highest antioxidant activity, of 767 μmol TE/100g f.w. The results of this study recommendintroducing the studied varieties in diet due to the rich antioxidant properties.

scholarly journals Effects of Short-Term Exposure to Low Temperatures on Proline, Pigments, and Phytochemicals Level in Kale (Brassica oleracea var. acephala)

Horticulturae ◽  
2021 ◽  
Vol 7 (10) ◽  
pp. 341
Author(s):  
Valentina Ljubej ◽  
Erna Karalija ◽  
Branka Salopek-Sondi ◽  
Dunja Šamec
Keyword(s):  
Brassica Oleracea ◽  
Phenolic Acids ◽  
Low Temperatures ◽  
Freezing Temperature ◽  
Total Phenolic ◽  
Total Polyphenol ◽  
Good Tolerance ◽  
Short Term Exposure ◽  
Health Related ◽  
Metabolite Synthesis

Kale (Brassica oleracea var acephala) is known as a vegetable with good tolerance of environmental stress and numerous beneficial properties for human health, which are attributed to different phytochemicals. In the present study, investigation of how low temperatures affect proline, pigments and specialized metabolites content was performed using 8-weeks old kale plants subjected to chilling (at 8 °C, for 24 h) followed by short freezing (at −8 °C, for 1 h after previous acclimation at 8 °C, for 23 h). Plants growing at 21 °C served as a control. In both groups of plants (exposed to low temperatures and exposed to short freezing) a significant increase in proline content (14% and 49%, respectively) was recorded. Low temperatures (8 °C) induced an increase of pigments (total chlorophylls 7%) and phytochemicals (phenolic acids 3%; flavonoids 5%; carotenoids 15%; glucosinolates 21%) content, while exposure to freezing showed a different trend dependent upon observed parameter. After freezing, the content of chlorophylls, carotenoids, and total phenolic acids retained similar levels as in control plants and amounted to 14.65 ± 0.36 mg dw g−1, 2.58 ± 0.05 mg dw g−1 and 13.75 ± 0.07 mg dw CEA g−1, respectively. At the freezing temperature, total polyphenol content increased 13% and total flavonoids and glucosinolates content decreased 21% and 54%, respectively. Our results suggest that acclimatization (23 h at 8 °C) of kale plants can be beneficial for the accumulation of pigments and phytochemicals, while freezing temperatures affect differently specialized metabolite synthesis. The study suggests that growing temperature during kale cultivation must be considered as an important parameter for producers that are orientated towards production of crops with an increasing content of health-related compounds.

scholarly journals Soluble carbohydrates in cereal (wheat, rye, triticale) seed after storage under accelerated ageing conditions

2011 ◽  
Vol 79 (1) ◽  
pp. 21-25
Author(s):  
Agnieszka I. Piotrowicz-Cieślak ◽  
Maciej Niedzielski ◽  
Dariusz J. Michalczyk ◽  
Wiesław Łuczak ◽  
Barbara Adomas
Keyword(s):  
Moisture Content ◽  
Spring Wheat ◽  
Soluble Sugars ◽  
Dry Mass ◽  
Soluble Carbohydrates ◽  
Accelerated Ageing ◽  
Winter Rye ◽  
Seed Moisture Content ◽  
Winter Triticale ◽  
Seed Moisture

Germinability and the content of soluble carbohydrates were analysed in cereal seed (winter rye, cv. Warko; spring wheat, cv. Santa; hexaploid winter triticale, cv. Fidelio and cv. Woltario). Seed moisture content (mc) was equilibrated over silica gel to 0.08 g H<sub>2</sub>O/g dry mass and stored in a desiccator at 20<sup>o</sup>C for up to 205 weeks or were equilibrated to mc 0.06, 0.08 or 0.10 g H<sub>2</sub>O/g dm and subjected to artificial aging at 35<sup>o</sup>C in air-tight laminated aluminium foil packages for 205 weeks. It was shown that the rate of seed aging depended on the species and seed moisture content. The fastest decrease of germinability upon storage was observed in seed with the highest moisture level. Complete germinability loss for winter rye, winter triticale cv. Fidelio, winter triticale cv. Woltario and spring wheat seed with mc 0.10 g H<sub>2</sub>O/g dm<sup>3</sup> occurred after 81, 81, 101 and 133 weeks, respectively. Fructose, glucose, galactose, myo-inositol, sucrose, galactinol, raffinose, stachyose and verbascose were the main soluble carbohydrates found in the seed. The obtained data on the contents of specific sugars and the composition of soluble sugars fraction in seed of rye, wheat and triticale did not corroborate any profound effect of reducing sugars, sucrose and oligosaccharides on seed longevity.

scholarly journals Preliminary Study on Effect of Early Defoliation on Dry Matter Accumulation and Storage of Reserves on ‘Abbé Fétel’ Pear Trees

HortScience ◽  
2019 ◽  
Vol 54 (12) ◽  
pp. 2169-2177 ◽  
Author(s):  
Karen Mesa ◽  
Sara Serra ◽  
Andrea Masia ◽  
Federico Gagliardi ◽  
Daniele Bucci ◽  
...  
Keyword(s):  
Dry Matter ◽  
Management Practices ◽  
Soluble Sugar ◽  
Soluble Sugars ◽  
Growing Season ◽  
Soluble Carbohydrates ◽  
Soluble Carbohydrate ◽  
Sink Strength ◽  
Dry Matter Accumulation ◽  
Pear Trees

Annual accumulation of starch is affected by carbon reserves stored in the organs during the growing season and is controlled mainly by sink strength gradients within the tree. However, unfavorable environmental conditions (e.g., hail events) or application of management practices (e.g., defoliation to enhance overcolor in bicolor apple) could influence the allocation of storage carbohydrates. This preliminary research was conducted to determine the effects of early defoliation on the dry matter, starch, and soluble carbohydrate dynamics in woody organs, roots, and mixed buds classified by age and two levels of crop-load for one growing season in ‘Abbé Fétel’ pear trees (Oct. 2012 to mid-Jan. 2013 in the northern hemisphere). Regardless of the organs evaluated (woody organs, roots, and mixed buds), an increase of soluble carbohydrate concentration was observed in these organs in the period between after harvest (October) and January (dormancy period). Among all organs, woody short-old spurs showed the highest increase (+93.5%) in soluble sugars. With respect to starch, woody organs showed a clear trend of decreasing in concentration between October and January. In this case, short-old spurs showed the smallest decline in starch concentrations, only 6.5%, whereas in other tree organs starch decreased by 34.5%. After harvest (October), leaves showed substantially higher starch and soluble sugar concentrations in trees with lower crop-loads. These results confirm that in the period between October and January, dynamic interconversions between starch and soluble carbohydrates occur at varying magnitudes among organs in pear trees.

scholarly journals Kandungan Antioksidan pada Kubis Merah (Brassica oleracea L.) Dan Aplikasinya Pada Pembuatan Kerupuk

METANA ◽  
2018 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Aldila Sagitaning Putri ◽  
Endang i Bekti Kristiani ◽  
Sri Haryati
Keyword(s):  
Antioxidant Activity ◽  
Brassica Oleracea ◽  
Ash Content ◽  
Agricultural Products ◽  
Anthocyanin Content ◽  
Red Cabbage ◽  
Organoleptic Test ◽  
Tapioca Flour ◽  
Brassica Oleracea L

Kubis Merah (Brassica oleracea L.) merupakan salah satu hasil pertanian yang mengandung kandungan antosianin yang berpotensi sebagai antioksidan. Tujuan yang hendak dicapai dalam penelitian ini adalah untuk menggali potensi kubis merah sebagai antioksidan alami pada kerupuk kubis merah. Tahapan dari penelitian ini adalah pembuatan kerupuk kubis merah dengan berbagai formulasi tepung tapioka dan kubis merah, uji organoleptik serta penentuan aktivitas antioksidan dan kadar antosianin. Hasil penelitian menunjukkan bahwa aktivitas antioksidan dari kubis merah dan kerupuk kubis merah sebesar. Dari uji organoleptik yang paling disukai panelis adalah perlakuan T2K1 yaitu 150 gram tapioka dan 50 gram kubis mera yang memiliki kadar air sebesar 15,49%, kadar abu 1,18%, kadar protein 1,48%, kadar lemak 16,55%, antosianin 1,31% dan aktivitas antioksidan sebesar 23,93%. Dengan demikian dapat disimpulkan bahwa kerupuk kubis merah memiliki potensi sebagai sumber antioksidan. Antioxidant content  in Red Cabbage  (Brassica oleracea L.) and Application In The Making of Crackers Red Cabbage (Brassica oleracea L.) is one of the agricultural products containing anthocyanin content that has potential as antioxidant. The purpose of  this study was to explore the potential of red cabbage as a natural antioxidant in red cabbage crackers. The stages of this research are the manufacture of red cabbage crackers with various formulations of tapioca flour and red cabbage, organoleptic test and the determination of antioxidant activity and anthocyanin levels. The results showed that antioxidant activity of red cabbage and red cabbage cracker amounted to. The most preferred organoleptic test of panelist is T2K1 treatment which is 150 g tapioca and 50 g of red cabbage which has water content 15,49%, ash content 1,18%, protein content 1,48%, fat content 16,55%, antocyanin 1.31% and antioxidant activity of 23.93%. Thus it can be concluded that red cabbage crackers have the potential as a source of antioxidants.

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