growing period (of a plant species)
1plant disease — ▪ plant pathology Introduction an impairment of the normal state of a plant that interrupts or modifies its vital functions. All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …
2Plant hormone — Plant hormones (also known as phytohormones) are chemicals that regulate plant growth. Plant hormones are signal molecules produced within the plant, and occur in extremely low concentrations. Hormones regulate cellular processes in targeted… …
3plant — plantable, adj. plantless, adj. plantlike, adj. /plant, plahnt/, n. 1. any member of the kingdom Plantae, comprising multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that… …
4plant development — Introduction a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… …
5Plant — For other uses, see Plant (disambiguation). Plants Temporal range: Early Cambrian to recent, but see text, 520–0 Ma …
6Plant defense against herbivory — Poison ivy produces urushiol to protect the plant from herbivores. In humans this chemical produces an allergic skin rash, known as urushiol induced contact dermatitis …
7plant breeding — Introduction application of genetic (genetics) principles to produce plants that are more useful to humans. This is accomplished by selecting plants found to be economically or aesthetically desirable, first by controlling the mating of… …
8Plant sexuality — Close up of an Echinopsis spachiana flower, showing both carpels (only the styles and stigmas are visible) and stamens, making it a perfect flower. Plant sexuality covers the wide variety of sexual reproduction systems found across the plant… …
9Species problem — The species problem is a mixture of difficult, related questions that often come up when biologists identify species and when they define the word species .One common but sometimes difficult question is how best to decide just which particular… …
10Plant evolutionary developmental biology — For a more ecological discussion on the evolution of plant morphology, refer to Evolutionary history of plants Evolutionary developmental biology (evo devo) refers to the study of developmental programs and patterns from an evolutionary… …
