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Pyrus calleryana, also known as the Callery pear or Bradford pear, is a species of pear tree native to China and Vietnam, [2] in the family Rosaceae. It is most commonly known for its cultivar 'Bradford' and its offensive odor, widely planted throughout the United States and increasingly regarded as an invasive species .
leaf level : photosynthetic water-use efficiency (also called instantaneous water-use efficiency WUE inst), which is defined as the ratio of the rate of net CO 2 carbon assimilation (photosynthesis) to the rate of transpiration or stomatal conductance, [1] then called intrinsic water-use efficiency [2] (iWUE or W i)
It had glossy, dark green leaves, brilliant fall foliage color, a uniform branching habit, and most notably, a massive spring crop of white flowers. He named his selection Bradford. And the rest ...
9% (collected as sugar) → 35–40% of sugar is recycled/consumed by the leaf in dark and photo-respiration, leaving; 5.4% net leaf efficiency. Many plants lose much of the remaining energy on growing roots. Most crop plants store ~0.25% to 0.5% of the sunlight in the product (corn kernels, potato starch, etc.).
The first component is called the 'Leaf Area Ratio' (LAR) and indicates how much leaf area there is per unit total plant mass. For young plants, values are often in the range of 1–20 m 2 kg −1, for tree seedlings they are generally less. The second component is the 'Unit Leaf Rate' (ULR), which is also termed 'Net Assimilation Rate' (NAR).
The Bradford pear (Pyrus calleryana 'Bradford') is widespread as an ornamental tree in North America, where it has become invasive in regions. [39] [40] [41] It is also used as a blight-resistant rootstock for Pyrus communis fruit orchards. [38] [39] The Willow-leaved pear (Pyrus salicifolia) is grown for its silvery leaves, flowers, and its ...
After the Grizzlies' 125-112 loss, Ja Morant wasn't sure why his father got ejected, but he had an idea. "He probably got kicked out so I didn't," he said. "He probably was complaining about ...
Stomatal conductance, usually measured in mmol m −2 s −1 by a porometer, estimates the rate of gas exchange (i.e., carbon dioxide uptake) and transpiration (i.e., water loss as water vapor) through the leaf stomata as determined by the degree of stomatal aperture (and therefore the physical resistances to the movement of gases between the air and the interior of the leaf).