scholarly journals Response of Cucumber (Cucumis sativus L.) and Squash (Cucurbita pepo L. var. melopepo) Roots to Chilling Stress during Early Stages of Seedling Development

1994 ◽  
Vol 119 (5) ◽  
pp. 964-970 ◽  
Author(s):  
Eleazar Reyes ◽  
Paul H. Jennings
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Cucurbita Pepo ◽  
Chilling Stress ◽  
Dry Weight ◽  
Root Tip ◽  
Crop Species ◽  
Cucumis Sativus L ◽  
Chilling Temperatures ◽  
Cucumber Roots

Roots of `Golden Girl' squash (Cucurbita pepo var. melopepo) and `Encore' cucumber (Cucumis sativus L.), 4- and 3-days-old, respectively, were exposed to 2, 6, 10, and 15C for 24, 48, 96, 144, and 192 hours to compare the sensitivity to chilling temperatures and the subsequent recovery at more favorable temperatures. Seedlings were more sensitive to chilling at 2 and 6C when measured by their ability to resume growth when returned to 26C. Root growth decreased after 48 hours of chilling. Seedlings stressed at 10 and 15C were able to continue root growth at these temperatures and when returned to 26C. However, seedlings at 10C exhibited root-tip browning in both crop species, suggesting disfunction in metabolic pathways that were repressed in seedlings growing at 2C where those symptoms were not present. Effects on root dry weight occurred in the first 24 hours at all temperatures studied. After 96 hours of treatment, seedlings grown at 2 and 6C were irreversibly damaged, as evidenced by their inability to resume growth when returned to 26C. Leakage of electrolytes from squash and cucumber roots increased after 48 hours at 2C. Potassium, Na+, and PO4-2 were lost in greater amounts than Mg+2, Cl-, and SO4-2. No difference in ionic leakage occurred at 10 and 15C, and Ca+2 leakage was not detected at any chilling stress temperature.

Effect of Naptalam on Chloramben Toxicity, Uptake, Translocation, and Metabolism in Cucumber (Cucumis sativus)

Weed Science ◽  
1991 ◽  
Vol 39 (1) ◽  
pp. 27-32
Author(s):  
Larry D. Knerr ◽  
Herbert J. Hopen ◽  
Nelson E. Balke
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Shoot Growth ◽  
Petri Dish ◽  
Dry Weight ◽  
Laboratory Studies ◽  
Cucumber Seedlings ◽  
Plant Parts ◽  
Cucumber Roots ◽  
Hydroponically Grown

Laboratory studies demonstrated that naptalam safens cucumber against the phytotoxic effects of chloramben. In petri dish studies, cucumber seedlings grown from seeds exposed to chloramben plus naptalam had greater shoot growth, root growth, and dry weight than seedlings grown from seeds exposed to chloramben alone. Naptalam also partially reversed the reduction in dry weight of various plant parts caused by exposure of roots of hydroponically grown seedlings to chloramben. More radioactivity from root-applied14C-chloramben remained in cucumber roots and less was translocated to shoots with a14C-chloramben plus naptalam treatment than with a14C-chloramben alone treatment. Naptalam appeared to influence chloramben metabolism. In various plant parts, concentrations of chloramben and its metabolites differed between the two treatments.

scholarly journals Temperature Effects on Imbibition and Germination of Cucumber (Cucumis sativus) Seeds

1994 ◽  
Vol 119 (3) ◽  
pp. 464-467 ◽  
Author(s):  
Paul Jennings ◽  
Mikal E. Saltveit
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Chilling Tolerance ◽  
Fresh Weight ◽  
Mature Fruit ◽  
Cucumis Sativus L ◽  
Tolerance Level ◽  
Radicle Emergence ◽  
Chilling Temperatures ◽  
Germinating Seeds

Unlike horticulturally mature fruit of `Dasher II' and `Poinsett 76' cucumbers (Cucumis sativus L.), two cultivars that differ significantly in their level of chilling tolerance, imbibing and germinating seeds of these two cultivars responded similarly to chilling temperatures (e.g., increases in fresh weight, time to radicle emergence, and root growth). `Dasher II' and `Poinsett 76' seeds were imbibed and germinated at 10 to 30C, and seeds germinated at 25C for 24 h were chilled at 2.5C for various durations. In comparison, seeds from an aged lot of `Poinsett 76' seed (1989) responded very differently from the 1992 seed lots in all experiments. The chilling tolerance level of germinating `Poinsett 76' seed varied with the seedling age as measured by resumption of root growth. Our results suggest that some factor that confers chilling tolerance is gradually lost during the early stages of germination following imbibition.

scholarly journals Assessment of Salicylic Acid Impacts on Seedling Characteristic of Cucumber (Cucumis sativus L.) under Water Stress

2012 ◽  
Vol 4 (1) ◽  
pp. 112-115 ◽  
Author(s):  
Hossein MARDANI ◽  
Hassan BAYAT ◽  
Amir Hossein SAEIDNEJAD ◽  
Ehsan Eyshi REZAIE
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Water Deficit ◽  
Cucumis Sativus ◽  
Foliar Application ◽  
Dry Weight ◽  
Water Deficit Stress ◽  
Cucumis Sativus L ◽  
Water Stress Tolerance ◽  
Randomized Design

Impacts of various concentrations of salicylic acid (SA) on cucumber (Cucumis sativus L.) seedling characteristic were evaluated under different water stress levels by using a factorial arrangement based on completely randomized design with three replications at experimental greenhouse of Ferdowsi University of Mashhad, Iran. The studied factors included three water deficit levels (100% FC, 80% FC, and 60% FC) considered as first factor and five levels of SA concentrations (0, 0.25, 0.5, 0.75, and 1 mM) as second factor. Results showed that foliar application of SA at the highest concentration enhanced leaf area, leaf and dry weight while decreased stomatal conductance under high level of water deficit stress. Though, severe water deficit stress sharply raised the SPAD reading values. In general, exogenous SA application could develop cucumber seedling characteristic and improve water stress tolerance.

scholarly journals The Influence of Aqueous Ferns Extracts on Cucumber (Cucumis sativus L.) Root Growth

Proceedings ◽  
2020 ◽  
Vol 57 (1) ◽  
pp. 79
Author(s):  
Liliana Cristina Soare ◽  
Irina Fierăscu ◽  
Radu Claudiu Fierăscu ◽  
Codruța Mihaela Dobrescu ◽  
Andra Maria Niculae ◽  
...  
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Cucumis Sativus L ◽  
Cucumber Root

In this study, we aimed to establish the influence of aqueous ferns extracts on the growth in length of the cucumber root. [...]

scholarly journals Allelochemical p-hydroxybenzoic acid inhibits root growth via regulating ROS accumulation in cucumber (Cucumis sativus L.)

2020 ◽  
Vol 19 (2) ◽  
pp. 518-527 ◽  
Author(s):  
Cheng-zhen HUANG ◽  
Lei XU ◽  
Sun Jin-jing ◽  
Zhong-hua ZHANG ◽  
Mei-lan FU ◽  
...  
Keyword(s):  
Root Growth ◽  
Cucumis Sativus ◽  
Hydroxybenzoic Acid ◽  
Cucumis Sativus L ◽  
Ros Accumulation

scholarly journals Pengaruh Air Lindi dan Bio Slurry Sebagai Pupuk Organik Cair Terhadap Pertumbuhan Tanaman Mentimun (Cucumis sativus L)

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Budi Santoso ◽  
Saimul Laili ◽  
Tintrim Rahayu
Keyword(s):  
Cucumis Sativus ◽  
Block Design ◽  
Liquid Waste ◽  
Dry Weight ◽  
Cucumber Plant ◽  
Cucumis Sativus L ◽  
Weight Concentration ◽  
Significant Difference ◽  
Wet Weight ◽  
Leachate Water

Leachate water is liquid waste that can arise due to the entry of water in landfills and can dissolve dissolved chemical elements such as organic matter resulting from decomposition. Slurry that has been lost gas is waste from biogas and is rich in nutrients needed in plants, but so far liquid leachate fertilizer and biogas waste have not been utilized properly. The purpose of this study was to determine the effect of leachate, bio slurry, and mixture on cucumber plant growth (Cucumis sativus L), and the best influence between leachate, bio slurry and a mixture of both. This study used an experimental method with randomized block design (RBD) with 9 treatments and 4x replications. The results of the study of Leachate Water, Bio slurry, and Mixture affected, plant length, on plant height, number of leaves, number of flowers, dry weight and plant wet weight. All treatments had an effect on the observed parameters at a concentration of 15 ml, 30 ml, or 45 ml, especially in observing wet weight and dry weight of plants. The treatment of leachate showed a significant difference in the wet weight concentration of 30 ml and dry weight concentration of 30 ml.Keywords: Leachate, Bio slurry, Cucumis sativus L ABSTRAKAir lindi adalah limbah cair dapat timbul karena masuknya air pada timbunan sampah dan bersifat dapat  melarutkan unsur kimiawi yang terlarut antara lain materi organik hasil dari dekomposisi. Kotoran ternak (slurry) yang sudah hilang gasnya merupakan limbah dari biogas  dan kaya dengan nutrisi yang di butuhkan pada  tanaman, namun selama ini pupuk cair air lindi dan limbah biogas belum dimanfaatkan dengan baik. Tujuan penelitian ini adalah mengetahui pengaruh air lindi, bio slurry, dan Campuran terhadap pertumbuhan tanaman mentimun (Cucumis sativus L), dan pengaruh yang terbaik antara air lindi, bio slurry dan campuran keduanya. Penelitian ini menggunakan metode eksperimen dengan rancangan acak kelompok (RAK) dengan 9 perlakuan dan 4x ulangan. Hasil penelitian Pemberian Air lindi, Bio slurry, dan Campuran berpengaruh , panjang tanaman, terhadap pada tinggi tanaman, jumlah pada daun, jumlah bunga, berat kering dan berat basah tanaman, Semua perlakuan memberikan pengaruh pada parameter yang di amati baik pada konsentrasi 15 ml, 30 ml, ataupun 45 ml, khususnya pada pengamatan berat basah dan berat kering tanaman. Pada perlakuan Air lindi menunjukkan beda nyata yang signifikan yaitu pada berat basah konsentrasi  30 ml dan berat kering konsentrasi 30 ml.  Kata kunci: Air lindi,Bio slurry,Cucumis sativus L

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