The Effect of Soil Temperature on the Growth of Phalaris Tuberosa L.

Morphological and Physiological Mechanisms of Temperature Compensation in Phosphate Absorption along a Latitudinal Gradient

“…Both laboratory measurements and field observations indicate that growth at low root temperature results in large root diameters, as also observed in the field by Dadykin ( 19S4) and in the laboratory by Ketellapper ( 1960). This effect of growth temperature has been compensated for in the course of evolution by smaller root diameter at a given growth temperature in cold-adapted than in warm-adapted populations of each species studied.…”

VARIATION IN SUMMER DORMANCY AMONG COLLECTIONS OF PHALARIS TUBEROSA AT DAVIS, CALIFORNIA

“…All but 11-2% ofthe plants has resumed growth by 1 Nov., and many of these produced new shoots before Nov. 14, when the auttimn rains began. Growth resumption after summer dormancy and before efiFective rainfall has been reported by other investigators (2,3,6). The mechanism of this behaviour in many species is not completely understood, but a secondary root system is responsible for the resumption of autumn growth in Ehrharta calycina (6).…”

“…Probably soil temperatures play an important role in the responses. Ketellapper (2) reported that summer dormancy can be induced in Phalaris by high soil temperatures, even when adequate soil moisture is present. In our investigation the soil temperature at a depth of 10 cm for 5-and 10-day periods during the summer did not reveal any consistent temperature changes near the onset or breaking of dormancy.…”

Effects of soil temperature gradient on growth and carbohydrate and nutrient element levels in three warm-season turfgrasses / by Garry Lee Seitz.

“…Augustinegrass plugs and roots after seven weeks growth on soil temperature gradient apparatus 16 Bermudagrass plugs and roots after five weeks growth on soil temperature gradient apparatus 17 Percent TNC in clippings averaged over all harvest dates of bahia, St. Augustine, and bermuda grass as affected by a gradient of soil temperatures 18 Percent TNC in verdure tissue of bahia, St. Augustine, and bermuda grass as affected by a gradient of soil temperatures. 47 19 Percent TNC in rhizomes and stolons of bahia, bermuda, and St. Augustine grass as affected by a gradient of soil temperatures 20 Percent TNC in roots of bahia, St. Augustine, and bermuda grass as affected by a gradient of soil temperatures 21 Mean TNC content (mgm) per pot in total clipping yields per pot of bahia, St. Augustine, and bermuda grass as affected by a gradient of soil temperatures. .…”

“…Recently, Youngner (72) controlled air temperatures and varied root temperatures along a gradient and showed that a soil temperature of 23.3°C (74°F) provided maximum root weight and root length for Cynodon dacty l on L. Root morphology was influenced by soil temperatures, according to Beard (6), who stated, in a literature review, that optimum soil temperatures produced turfgrass roots that were multibranched, thick, and white, whereas, roots grown at temperatures below optimum were thicker, shorter, and less to non-branched (21,58). Beard (6) also indicated that soil temperatures above optimum hastened maturity and senescence, resulting in brown, spindly roots.…”