Kinetin—A multiactive molecule

Barciszewski, Jan; Massino, Frank J.; Clark, Brian F. C.

doi:10.1016/j.ijbiomac.2006.06.024

Cited by 92 publications

(97 citation statements)

References 114 publications

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“…Surprisingly, the high levels of Kin were reached under the influence of SA during first 6 days of culture. It may be the result of cellular changes involving DNA degradation or intensive oxidative metabolism (Barciszewski et al 2007). It was shown that Kin is synthesised via the production of furfural, an oxidative damage product of DNA deoxyribose, and it is quenched by the adenine base (Barciszewski et al 2000).…”

Section: The Impact Of Biosynthetic Inhibitors On the Endogenous Hormmentioning

confidence: 99%

Effect of TIBA, fluridone and salicylic acid on somatic embryogenesis and endogenous hormone and sugar contents in the tree fern Cyathea delgadii Sternb.

2017

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Somatic embryogenesis (SE) in the tree fern Cyathea delgadii was first described in 2015 and since then has been used to exploration of this phenomenon in cryptogamic plants. To deepen the knowledge about the hormonal control of SE, stipe explants were cultured on media supplemented with hormone biosynthesis and transport inhibitors (HBTIs). In the presence of 30 µM 2,3,5-triiodobenzoic acid (TIBA), or 40 µM fluridone or 125 µM salicylic acid (SA), somatic embryo production was totally inhibited. The quantitative analysis of the changes in endogenous hormone and sugar contents was conducted every 2 days within 10-day-long initial culture. The results showed that the concentrations of endogenous indole-3-acetic acid (IAA), abscisic acid (ABA), cytokinins (CKs) and soluble sugars were strongly modified either by TIBA and fluridone. Under their influence, the contents of cytokinins such as c-Z, c-ZR, t-Z, t-ZR, KinR were reduced to barely detectable levels. Treatment with SA results in the changes in endogenous IAA and sugar contents. It also modifies the IAA/CKs ratio; however, excluding the first 2 days of culture, the concentrations of ABA and cytokinins were kept on the control level. All HBTIs significantly increased the kinetin (Kin) content. Our work sheds new light on the relationships between the biosynthetic inhibitors and phytohormones and sugars in the process of early SE. It can be helpful to study the role of hormones in acquisition of embryogenic competence.

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Section: The Impact Of Biosynthetic Inhibitors On the Endogenous Hormmentioning

confidence: 99%

Effect of TIBA, fluridone and salicylic acid on somatic embryogenesis and endogenous hormone and sugar contents in the tree fern Cyathea delgadii Sternb.

2017

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“…Air kelapa mengandung asam amino, asam-asam organik, asam nukleat, purin, gula, vitamin dan mineral (Netty 2002;Ma et al 2008). Air kelapa merupakan senyawa organik yang mengandung 1,3 diphenilurea, zeatin, zeatin glukosida, zeatin ribosida, kadar K dan Cl tinggi, sukrosa, fruktosa, glukosa, protein, karbohidrat, mineral, vitamin, sedikit lemak, Ca dan P (Yong et al 2009) dan kinetin (Barciszewski et al 2007). Zeatin, zeatin glukosida, zeatin ribosida merupakan ZPT yang dapat meningkatkan pembelahan sel dan perpanjangan sel.…”

Section: Pendahuluanunclassified

Pengaruh Pemberian Air Kelapa Dan Frekuensi Pemberian Terhadap Pertumbuhan Benih Cengkeh

Mayura¹,

Yudarfis²,

Idris³

et al. 2017

bul. littro

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Benih merupakan salah satu aspek budidaya yang mempunyai peranan penting. Untuk mendukung pertumbuhan benih dan peningkatan produksi cengkeh, pemberian unsur hara sangat diperlukan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh frekuensi dan konsentrasi pemberian air kelapa terhadap pertumbuhan benih cengkeh. Penelitian dilakukan di Kebun Percobaan Balittro Laing Solok Sumatera Barat, sejak Maret sampai September 2014. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 12 perlakuan konsentrasi air kelapa dan frekuensi pemberian yaitu (1) tanpa air kelapa/air dan frekuensi pemberian 1 kali (0/1), (2) 0/2, (3) 0/3, (4) konsentrasi air kelapa 200 ml l-1/1, (5) 200 ml l-1/2, (6) 200 cc l-1/3, (7) 400 ml l-1/1, (8) 400 ml l-1/2, (9) 400 ml l-1/3, (10) 600 ml l-1/1, (11) 600 ml l-1/2, (12) 600 ml l-1/3; interval waktu pemberian 2 minggu, 10 tanaman per plot diulang 3 kali. Variabel yang diamati meliputi pertumbuhan tanaman (tinggi tanaman, diameter batang, jumlah daun, panjang daun, lebar daun, panjang akar, jumlah akar utama) serta biomass (bobot basah dan kering batang, daun dan akar). Hasil penelitian menunjukkan pemberian air kelapa konsentrasi 600 ml l-1 dengan frekuensi pemberian satu kali, menghasilkan pengaruh terbaik terhadap pertumbuhan vegetatif benih cengkeh.

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“…1 Most natural cytokinins are N-6-substituted adenine derivatives generated as degradation products during depurination of DNA. 2 Since their discovery, a substantial number of biochemical and genetic studies have focused on elucidating the diverse roles of cytokinins in plant growth and, in particular, watertransport and water-stress conditions. 3 Cytokinins are also involved in other essential processes such as the sink/source relationship, vascular development, chloroplast differentiation, apical dominance, and senescence.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 Moreover, N-6-substituted adenine derivatives show pharmacological activity in humans, have found application in molecular medicine. 2 Gleditsia caspia (Leguminosae) is a perennial shrub that is found in temperate and sub-tropical North and South America, tropical Africa, and Central and Eastern Asia. In traditional Chinese medicine the genus Gleditsia is used in the treatment of apoplexy, as an expectorant, and for a pesticide.…”

Section: Introductionmentioning

confidence: 99%