A novel chemical tool compound that is an antagonist of brassinolide (BL, 1)-induced rice lamina joint inclination was developed. Although 2-O-, 3-O-, 22-O-, or 23-O-methylation of BL causes a critical decrease in biological activity,(5) a crystal structure of the extracellular leucine-rich repeat (LRR) domain of BRASSINOSTEROID-INSENSITIVE I (BRI1) bound to BL(3,4) indicates that the loss of a...

The Arabidopsis DEETIOLATED2 (DET2) gene has been cloned and shown to encode a protein that shares significant sequence identity with mammalian steroid 5a-reductases. Loss of DET2 function causes many defects in Arabidopsis development that can be rescued by the application of brassinolide; therefore, we propose that DET2 encodes a reductase that acts at the first step of the proposed biosynthe...

The Arabidopsis DEETIOLATED2 (DET2) gene has been cloned and shown to encode a protein that shares significant sequence identity with mammalian steroid 5 alpha-reductases. Loss of DET2 function causes many defects in Arabidopsis development that can be rescued by the application of brassinolide; therefore, we propose that DET2 encodes a reductase that acts at the first step of the proposed bios...

Eucalyptus globulus trees treated with oligo-carrageenan (OC) kappa showed an increase in NADPH, ascorbate and glutathione levels and activation of the thioredoxin reductase (TRR)/thioredoxin (TRX) system which enhance photosynthesis, basal metabolism and growth. In order to analyze whether the reducing redox status and the activation of thioredoxin reductase (TRR)/thioredoxin (TRX) increased t...

Studies were undertaken to elicit information to standardize the optimum dose and soaking period of bio growth regulators in rice seeds, to evaluate the effect of sources and method of application of bio-growth regulators (panchakavya and brassinolide) on organic rice seed during 2003 and 2004 and to assess the quality of rice seeds cv. ADT(R) 45). The results illustrated that, the combined use...

In the present study, eight kinds plant growth regulators—salicylic acid (SA), 1-naphthaleneacetic acid (NAA), gibberellic acid (GA3), 6-benzylaminopurine (6-BA), 2, 4-epi-brassinolide (EBR), abscisic acid (ABA), ethephon (ETH), and spermidine (SPD)—were used to investigate the impact on microalgal biomass, lipid, total soluble protein, carotenoids, and polyunsaturated fatty acids (PUFAS) produ...

The dumpy (dpy) mutant of tomato (Lycopersicon esculentum Mill.) exhibits short stature, reduced axillary branching, and altered leaf morphology. Application of brassinolide and castasterone rescued the dpy phenotype, as did C-23-hydroxylated, 6-deoxo intermediates of brassinolide biosynthesis. The brassinolide precursors campesterol, campestanol, and 6-deoxocathasterone failed to rescue, sugge...

Mục tiêu của nghiên cứu là (i) xác định thời điểm xuống giống và hoạt chất sinh trưởng cho tăng năng suất mè, (ii) thu hoạch phù hợp để đạt hàm lượng dầu trong hạt mè. Thí nghiệm 1 được bố trí 2 nhân tố: (A) gieo sạ (sớm 14 ngày, trùng với nông dân trễ ngày so dân); (B) sử dụng (Brassinolide, Canxi-Bo Selenium). dân), (85, 95 100% lá vàng). Mỗi thức có 3 lần lặp lại. Kết quả thấy sớm số trái tr...