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LEAF GRAFTS. "From grafting experiments, it is known that in some species, induced leaves are independently capable of generating a flowering stimulus over many days or even weeks while in others, favourable cycles must be continued until the apex has become recognizably floral, indicating the need for a continual supply of a floral stimulus (presumably from the leaf) if flower development is to be sustained." https://lnkd.in/d_f7kfY View in LinkedIn

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LEAVES DETECT DAYLENGTH. "Daylength therefore is perceived in leaves and results in a localized change in the properties of that leaf. Flowering then occurs as a result of a signal transmitted from the leaves to the apex. The change in the leaf is termed induction, while the response at the apex leading to the initiation of flowering is sometimes called evocation." https://lnkd.in/d_f7kfY View in LinkedIn

ACCIDENTAL HYBRIDS. "As virtual spaces become networked and very different potentialities of use collide or become intentionally conjoined, hybrid functionalities will be both intentionally and unintentionally spawned." https://lnkd.in/dCVHq5S View in LinkedIn

LEAF VS SHOOT PHOTORECEPTIVITY. "When either the leaves or the shoot tips of photoperiodically sensitive plants are exposed to different daylengths, flowering depends on the daylength given to the leaves and not to the apex. In several instances, leaves from plants, which have been given a daylength treatment that initiates flowering have been grafted on to plants that have not been exposed to permissive daylengths, with the result being flowering in the receptor plants." https://lnkd.in/d_f7kfY View in LinkedIn

DARK- AND LIGHT-DOMINANT. "Also, in long day plants, unlike in short day plants, the amount and spectral composition of the light given during the day period, especially in the latter part, has a large effect on flowering. If the response to daylength depends primarily on the length of the dark period, the plants are called dark-dominant and conversely, if the light period is the main influence, they are called light-dominant. In general, most short day plants are dark-dominant and most long day plants are light-dominant." https://lnkd.in/d_f7kfY View in LinkedIn

NIGHT BREAKS. "If a long night is interrupted by a short (e.g. 30 min) period of light (or night break) near the middle, short day plants respond as if they have been exposed to an long day. For long day plants, such night breaks are only effective if given in combination with daylengths that are just longer than those needed to permit flowering or if they are of several hours duration." https://lnkd.in/d_f7kfY View in LinkedIn

SHORT DAYS "did not cause flowering if they were coupled with short nights but when the night was sufficiently long, flowering occurred even when the accompanying light periods were long. However, although a sufficiently long dark period appeared to be the decisive factor for flowering to occur, the level of flowering was also affected by the length of the light period." https://lnkd.in/d_f7kfY View in LinkedIn

TENEBROPERIOD VS PHOTOPERIOD. "The length of the day and night are mutually linked within the 24-h daily cycle. Photoperiodic responses could therefore be theoretically determined by either the length of the day or the length of the night. Classic experiments with short day plant Xanthium revealed that flowering only occurred if the night length was greater than 8.5 h, irrespective of the relative durations of light and darkness in the experimental cycle." (Tenebris, latin for darkness). https://lnkd.in/d_f7kfY View in LinkedIn

OBLIGATE AND FACULTATIVE. "Plants that respond to daylength can be further subdivided into obligate (or qualitative) types, where a particular daylength is essential for flowering, or facultative (or quantitative) types, where a particular daylength accelerates but is not essential for flowering." https://lnkd.in/d_f7kfY View in LinkedIn