Kinetin

About: Kinetin is a research topic. Over the lifetime, 7856 publications have been published within this topic receiving 135550 citations. The topic is also known as: Kinetin.

High-frequency plant regeneration from leaf-disc cultures of Jatropha curcas L.: an important biodiesel plant

Abstract: A simple, high-frequency and reproducible protocol for induction of adventitious shoot buds and plant regeneration from leaf-disc cultures of Jatropha curcas L. has been developed. Adventitious shoot buds were induced from very young leaf explants of in vitro germinated seedlings as well as mature field-grown plants cultured on Murashige and Skoog’s (MS) medium supplemented with thidiazuron (TDZ) (2.27 μM), 6-benzylaminopurine (BA) (2.22 μM) and indole-3-butyric acid (IBA) (0.49 μM). The presence of TDZ in the induction medium has greater influence on the induction of adventitious shoot buds, whereas BA in the absence of TDZ promoted callus induction rather than shoot buds. Induced shoot buds were multiplied and elongated into shoots following transfer to the MS medium supplemented with BA (4.44 μM), kinetin (Kn) (2.33 μM), indole-3-acetic acid (IAA) (1.43 μM), and gibberellic acid (GA3) (0.72 μM). Well-developed shoots were rooted on MS medium supplemented with IBA (0.5 μM) after 30 days. Regenerated plants after 2 months of acclimatization were successfully transferred to the field without visible morphological variation. This protocol might find use in mass production of true-to-type plants and in production of transgenic plants through Agrobacterium/biolistic-mediated transformation.

Kinetin-Induced Chloroplast Maturation in Cultures of Tobacco Tissue

Abstract: Cultured tobacco tissue possesses proplastids capable of differentiating into mature chloroplasts. Kinetin (6-furfurylaminopurine) is a specific requirement for this differentiation; the absence of this compound results in a blockage of the formation of grana. The possibility that kinetin exerts a direct effect upon chloroplast differentiation is considered.

Characterization of OsIAA1 gene, a member of rice Aux/IAA family involved in auxin and brassinosteroid hormone responses and plant morphogenesis

Abstract: Aux/IAA and auxin response factor (ARF) are two important families that have been well recognized for their roles in auxin-mediated responses. Aux/IAA proteins are short-lived transcriptional regulators that mediate the auxin responses through interaction with ARF transcription factors. Although quite a few members of the Aux/IAA family have been functionally characterized in dicotyledonous plants such as Arabidopsis, but relatively limited information is available in important crops such as rice. This work focused on isolation and characterization of a member of Aux/IAA family in rice named OsIAA1. The results indicated that OsIAA1 was constitutively expressed in all the tissues and organs investigated. The expression of this gene was induced by various phytohormones including IAA, 2,4-D, kinetin, 24-epibrassinolide, and jasmonic acid. Over-expression of OsIAA1 in rice resulted in reduced inhibition of root elongation to auxin treatment, but increased sensitivity to 24-epiBL treatment. In addition, the OsIAA1-overexpression transgenic plants showed distinctive morphological changes such as decreased plant height and loose plant architecture. Protein interaction analysis suggested that OsIAA1 may act through interaction with OsARF1. T-DNA insertion mutant of OsARF1 showed reduced sensitivity to BR treatment, resembling the phenotype of OsIAA1-overexpression plants. In addition, expression patterns of some genes responsive to brassinosteroid and auxin were changed in the OsIAA1-overexpression plants. These data suggested that OsIAA1 may play important roles in the cross-talk of auxin and brassinosteroid signaling pathways and plant morphogenesis.