Biomaterial Database

Growth, graviresponsiveness and abscisic-acid content of Zea mays seedlings treated with fluridone. 1984

R Moore, and J D Smith

Department of Biology, Baylor University, Waco, TX 76798, USA.

Ten-d-old seedlings of Zea mays L. cv. Tx 5855 treated with 1-methyl-3-phenyl-5-(3-[trifluoromethyl]phenyl)-4-(1H)-pyridinone (Fluridone) were analyzed for abscisic acid (ABA) content using high-performance liquid chromatography with an analysis sensitivity of 2.5 ng ABA g-1 fresh weight (FW). Seedlings were divided into three portions: leaves, detipped roots, and root tips (terminal 1.5 mm). Control plants (water treatment only; no Fluridone) were characterized by the following amounts of ABA: leaves, 0.114 +/- 0.024 (standard deviation) microgram ABA g-1 FW; detipped roots, 0.260 +/- 0.039 +/- microgram ABA g-1 FW; root tips, no ABA detected. We did not detect any ABA in tissues of Fluridone-treated plants. Primary roots of treated and untreated seedlings were strongly graviresponsive, with no significant differences between the curvatures or the growth rates of primary roots of Fluridone-treated and control seedlings. These results indicate that 1) Fluridone completely inhibits ABA synthesis, and 2) ABA is not necessary for positive gravitropism by primary roots of Zea mays.

UI	MeSH Term	Description	Entries
D011728	Pyridones	Pyridine derivatives with one or more keto groups on the ring.	Pyridinones
D002338	Carotenoids	The general name for a group of fat-soluble pigments found in green, yellow, and leafy vegetables, and yellow fruits. They are aliphatic hydrocarbons containing 4 terpene subunits.	Carotenes,Carotenoid,Tetraterpene Derivatives,Tetraterpenes,Carotene,Derivatives, Tetraterpene
D003313	Zea mays	A plant species of the family POACEAE. It is a tall grass grown for its EDIBLE GRAIN, corn, used as food and animal FODDER.	Corn,Indian Corn,Maize,Teosinte,Zea,Corn, Indian
D006540	Herbicides	Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.	Algaecide,Algicide,Herbicide,Algaecides,Algicides
D000040	Abscisic Acid	Abscission-accelerating plant growth substance isolated from young cotton fruit, leaves of sycamore, birch, and other plants, and from potatoes, lemons, avocados, and other fruits.	2,4-Pentadienoic acid, 5-(1-hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3-methyl-, (S-(Z,E))-,Abscisic Acid Monoammonium Salt, (R)-Isomer,Abscisic Acid, (+,-)-Isomer,Abscisic Acid, (E,E)-(+-)-Isomer,Abscisic Acid, (E,Z)-(+,-)-Isomer,Abscisic Acid, (R)-Isomer,Abscisic Acid, (Z,E)-Isomer,Abscissic Acid,Abscissins
D018466	Gravity Sensing	Process whereby a cell, bodily structure, or organism (animal or plant) receives or detects a gravity stimulus. Gravity sensing plays an important role in the directional growth and development of an organism (GRAVITROPISM).	Gravisensing,Gravity Perception,Perception, Gravity,Sensing, Gravity
D018518	Plant Root Cap	A cone-shaped structure in plants made up of a mass of meristematic cells that covers and protects the tip of a growing root. It is the putative site of gravity sensing in plant roots.	Plant Root Caps,Cap, Plant Root,Caps, Plant Root,Root Cap, Plant,Root Caps, Plant
D018522	Gravitropism	The directional growth of organisms in response to gravity. In plants, the main root is positively gravitropic (growing downwards) and a main stem is negatively gravitropic (growing upwards), irrespective of the positions in which they are placed. Plant gravitropism is thought to be controlled by auxin (AUXINS), a plant growth substance. (From Concise Dictionary of Biology, 1990)	Geotropism,Geotropisms,Gravitropisms