Study on the Anatomy of Young Coffee Plants from Micro-Cuttings and Induced to Sprout

Micro-cuttings coming from Catucaí coffee plants were established in the greenhouse and treated to sprout by decapitation and application of 600 mg/l triiodobenzoic acid. The morphology and the anatomy of treated and control plants were compared. Treated plants produced only orthotropic sprouts, useful for micro-cutting, while control plants produced only plagiotropic sprouts. Direct connections between the orthotropic sprouts and the petiole accessory veins were observed only in treated plants. All together, these results were interpreted as consequences of disturbances in the auxin transport systems, which shape apical dominance and bud dormancy.

Effects of 2, 3, 5-triiodobenzoic acid on the anatomical changes of chickpea var. BARI Chola-7

not available Dhaka Univ. J. Biol. Sci. 28(2): 227-231, 2019 (July)

Synthesis of Lanthanoid Complexes from Ln2O3 and Diatrizoic Acid

We present a pathway to synthesize diatrizoate lanthanoid complexes directly from Ln2O3 and diatrizoic acid (DTAH=3,5-diacetamido-2,4,6-triiodobenzoic acid) at room temperature yielding [Ln(H2O)8][DTA]3 in moderate (for the heavier lanthanoids) to good (for the lighter lanthanoids) yields. Compounds were recrystallized from DMSO or water and their X-ray crystal structures were obtained. The complexes have metal centres solely coordinated by solvent molecules with no direct interaction between the metal centre and the DTA anion. The compounds crystallized from DMSO have the formulation [Ln(DMSO)4(H2O)4][DTA]3.DMSO (Ln=La, Nd, Sm, Eu, Dy; only unit cell data were confirmed for Ln=Nd, Sm) whereas the compound crystallized from water has the formulation [Dy(H2O)8][DTA]3.7H2O.

Differential effects of N-1-naphthylphthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) on auxin control of swelling of the shoots of Bryophyllum calycinum Salisb.

The effects of <em>N</em>-1-naphthylphthalamic acid (NPA) and 2,3,5-triiodobenzoic acid (TIBA) on the swelling of the stem in intact and decapitated plants of <em>Bryophyllum calycinum</em> in relation to the interaction with auxin, indole-3-acetic acid (IAA), are described. NPA induced conspicuous local internode swelling only in the area of its application in intact plants and in the decapitated internode in the case of simultaneous application of IAA on the top of the internode. By contrast, TIBA applied to an internode of intact plants induced swelling along the entire internode above the treatment area, and similar results were obtained in the decapitated internode when TIBA was applied in the middle of the internode and IAA was applied onto the top of the internode. The differential effect of NPA and TIBA on stem swelling in <em>B. calycinum</em> is discussed in relation to their differential mode of action on auxin transport.

Growth Analysis of Chickpea var. Bari Chola-7 Following Application of TIBA (2, 3, 5- Triiodobenzoic Acid)

An investigation was made to see the effect of different concentrations (10, 20, 30 and 40 ppm) of 2, 3, 5- triiodobenzoic acid (TIBA) on leaf area index (LAI), leaf area duration (LAD), crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) of a cultivar of chickpea (Cicer arietinum L.) grown during rabi season of 2015 - 2016. Results revealed that LAI and LAD showed a positive response from flowering stage to maturity (66 - 110 DAS) due to 30 ppm TIBA application with maximum LAI and LAD occurring at the flowering stage. At 66 - 83 and 83 - 97 DAS, CGR was highest with the application of 30 ppm TIBA, while RGR was highest due to 10 ppm TIBA. Peak CGR was recorded at the time of pod setting to pod filling stage (8 - 97) and increased over control by 29.64%. Irrespective of the treatments, NAR was recorded maximum during flowering stage to pod setting (66 - 83 DAS) and thereafter decreased till maturity. At 66 - 83 and 83 - 97 DAS, maximum NAR values were recorded due to 30 ppm TIBA and the increases were 9.09 and 32.69% higher over the control, respectively.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 2, 199-205, 2016