Potential Regulatory Role of Gibberellic and Humic Acids in Sprouting ofChlorophytum borivilianumTubers

Abstract

Tubers of safed musli (Chlorophytum borivilianum) were immersed in three different concentrations of gibberellic acid (GA3) or humic acid (HA) prior to planting. The highest concentration of GA3 (20 mg L−1) and all concentrations of HA (5, 10, and 15%) appeared to hasten tuber sprouting and promote uniform sprouting pattern. The use of 20 mg L−1 GA3 or 15% HA successfully improved sprouting and mean sprouting time. Safed musli growth and development was improved through the increase in the number of leaves, total leaf area, leaf area index, and total fibrous root length. This directly influenced the number of new tubers formed. The use of 20 mg L−1 GA3 or 15% HA gave similar response with nonsignificant difference among them. However, due to the cost of production, the result from this study suggests that 15% HA should be used to obtain improved sprouting percentage, homogeneous stand establishment, efficient plant growth and development, and increased yield of safed musli.

Interaction between Humic Substances and Plant Hormones for Phosphorous Acquisition

“…Typical effects of GAs are hypocotyl elongation, interruption of dormancy, promotion of flower and fruit development, and amylase induction. Similar effects have been observed with HS soil additions [57][58][59][60]. In addition to the GA-like impacts, HS has been found to up-regulate the metabolism of CKs and GAs by interacting with genes involved with these hormones [53].…”

Sulfur-enriched leonardite and humic acid soil amendments enhance tolerance to drought and phosphorus deficiency stress in maize (Zea mays L.)

“…It also improves the fertility of soil by improving its biological, physical and chemical properties [75][76][77] . Nakasha, et al 78 observed that application of HA before planting of safed musli (Chlorophytum borivilianum L.) at the rate of 5, 10, and 15% not only enhanced tuber sprouting, but hastened uniform sprouting pattern, and increased leaf area index, leaf area, number of leaves, and total root length. Similarly, S is an essential plant nutrient needed for maintaining optimal plant growth.…”

Effects of GA3Pregerminative Treatment onGentiana luteaL. var.aurantiacaGermination and Seedlings Morphology

“…This dormancy can be removed by cold treatment [ 12 , 13 ], by cold stratification [ 14 ], and by GA 3 treatment. GA 3 , alone or together with other chemical or physical treatments, is widely used to remove seed dormancy [ 15 ] or to improve the development of the seedlings, although diverse results have been obtained [ 16 – 19 ]. Related to this, a study with G. lutea seeds was carried out on germination rates in Petri dishes using GA 3 and a stratification treatment [ 20 ].…”