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A gene from rice (Osmyb4), which codes for a transcription factor, that was shown to increase cold and drought tolerance in transgenic Arabidopsis thaliana plants, was inserted into the tomato. This resulted in increased drought tolerance, but did not appear to have any effect on cold tolerance. [19]
Early Girl can tolerate temperatures as low as 40 °F (4 °C) [1] and is well-suited to hot, dry climates. [2] Early girl is reliable and prolific. The ripe fruit is extremely standard for a tomato, about the size and shape of a tennis ball and weighing 4 to 8 ounces (110 to 230 g). The tomatoes have a bright color and good flavor.
Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bedding plants which are sown in heat in winter or early spring, and planted outside after all danger of frost has passed.
It has been adapted by and to other countries (such as Canada) in various forms. A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.
In general, tomatillo plants are tolerant to many different soil conditions. However, they do best in well-drained, sandy, fertile soil conditions with a pH between 5.5 and 7.3. [14] Tomatillo plants are cold sensitive. [15] They grow best at 25 to 32 °C (77 to 90 °F). Below 16 °C (61 °F), growth is very poor. [13]
Cold hardening is a process in which a plant undergoes physiological changes to avoid, or mitigate cellular injuries caused by sub-zero temperatures. [1] Non-acclimatized individuals can survive −5 °C, while an acclimatized individual in the same species can survive −30 °C.
Generally a temperature rise, above usually 10 to 15 °C above ambient, can be considered heat shock or heat stress. Heat tolerance is broadly defined as the ability of the plant tolerate heat – means that grow and produce economic yield under high temperatures.
Celebrity plants in their early stages. Celebrity tomato plant requires full sun to grow and reach its potential height, bear fruits and achieve maximum yields. [5] Although Celebrity tomatoes can be grown in a wide range of soils it is recommended to plant them in loosely packed and nutrient-rich soils.
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