plants using root drenching, foliage sprays, and seed treatment displayed plant growth-promoting abilities. Previous studies have reported that endophytic microorganisms often release small and low-molecular weight volatile organic compounds (VOCs) that
ROS in the growth areas during root elongation and differentiation. Furthermore, HA was able to regulate ROS homeostasis in rice roots during root development ( Olaetxea et al., 2016 ). Phenolic compounds are considered secondary metabolites ( Kefeli
induction of resistance by a root-endophytic fungus ( Waller et al., 2005 ). In addition, Hardoim et al. (2008) reported that some endophytic bacteria promoted host plant growth by producing plant growth-promoting substances and fixing nitrogen (N) from
blue LEDs produced larger bulblets and a higher number of roots ( Lian et al., 2002 ). Phenolic compounds are known to play a role as endogenous promoters and inhibitors of adventitious root formation ( Wu et al., 2007b ). In difficult-to-root species
encourage primary root development ( Phillips et al., 1997 ), although ABA has roles in promoting stability of the photosynthetic apparatus ( Gong et al., 1998 ) and gene expression ( Chandler and Robertson, 1994 ). When applied as a foliar spray, ABA
secondary compounds necessary for life ( Taiz and Zeiger, 2006 ). They contain an amino group (NH 2 ) that makes them a possible N source for plants. When foliarly applied, some AAs can enter the plant through leaf tissue, resulting in N uptake ( Joy and
A series of experiments were conducted to investigate the effects of chlorocholine and similar compounds such as choline, chlorocholine chloride (CCC or chlormequat) and other compounds on the rooting and seedling quality for transplanting. The growth of shoot and root and the ratio of shoot/root were influenced and consequently the seedling quality was improved by chlorocholine treatment. Mungbean bioassays for plant hormone revealed that rooting was promoted and shoot growth or stem elongation was inhibited by the treatment. Addition of other PGRs such as atonik, vitamins and surfactants to chlorocholine solution significantly promoted the rooting of mungbean cuttings as well as the rooting of cutting of sweet potato, cucumber, and watermelon.
Abstract
Three lipid-like root-promoting compounds were isolated from the easy-to-root juvenile form of English ivy, Hedera helix L. The purification procedure involves extracting with methanol-chloroform and chromatography on columns of charcoal-celite, silica gel and LH-20 Sephadex. Ultraviolet and infrared spectroscopic studies suggest the presence of alcohol and nitrile functional groups. The 3 compounds are unstable and the instability is greatest when the substances are purified. In the purified state, the lipid-like compounds are colorless but become orange-yellow after breakdown. A loss of root-promoting activity occurs with the color change.
. The phenolics are the biochemical motif most active in Rubus plants for ethnomedicinal applications. Rubus phenolics include the flavonoids, potent in vitro antioxidants, including compounds such as flavones, isoflavones, flavonones, catechins, and
Abstract
Etiolated mung bean seedlings, Phaseolus aureus Roxb., when decapitated below the cotyledons show a linear decrease with time in root initiation. The decrease does not result from a loss of endogenous auxin because IBA fails to prevent the loss. Three root promoting compounds were found in an ethanolic extract of the hypocotyl tissue, but the level of the compounds could not be consistently related to the decrease in root initiation. Glucose, fructose and sucrose are the major sugars present in the hypocotyl tissue. Total sugar decreased in a linear manner with 2.0 mg lost during the 48-hr treatm ent period. Fifty percent of the decrease in root initiation could be regained by application of glucose or fructose. Total phenolic compounds decreased 20% during decapitation but their contribution to root formation was not determined because they were not purified.