. Journal of agricultural research . , 1919 Relation of Weather to Fruitjulness in Plum III and a large part of the water dripping from the tree fell immediatelyfrom the stamen cluster. When the style was the same length or shorterthan the stamens, the stigma was completely immersed in water. Incases where the style was considerably longer than the stamens, thestigma projected from the drop, especially in positions where the pistilspointed upward. During the period of drying after a rain, when the water holding thestamens and pistils is partly evaporated, the anthers break up intogroups, each
. Journal of agricultural research . , 1919 Relation of Weather to Fruitjulness in Plum III and a large part of the water dripping from the tree fell immediatelyfrom the stamen cluster. When the style was the same length or shorterthan the stamens, the stigma was completely immersed in water. Incases where the style was considerably longer than the stamens, thestigma projected from the drop, especially in positions where the pistilspointed upward. During the period of drying after a rain, when the water holding thestamens and pistils is partly evaporated, the anthers break up intogroups, each group, however, being still held in water. Gradually, uponfurther drying, the groups break up, and the anthers assume their normalposition in the flower. In order to study anther action more in detail at the time of rain, alimb which had been in bloom for three days was cut from a tree duringa heavy rain and brought into the laboratory, the temperature of whichwas about 68° F. All anthers were closed when first brought in, but some. Fig. I.—An outline drawing of an anther of Minnesota No. 12, showing the adjustment which takes place asa result of taking up or giving off water: A, an anther which has been open in the orchard for three days;B, the same with the anthers pushed up to show the dead area at the upper end of the filament; C, theappearance of the anther after two minutes in water. The anthers are completely closed and havereached their usual size; D, the degree of opening of one suture of the same anthers in 8 minutes whenexposed in the laboratory at a temperature of 70° F.; E, the same anther at the end of 12 minutes drying. opened completely in lo minutes under the conditions in the these anthers which had opened were again placed in water theyclosed in two to three minutes. Furthermore, anthers which had been open for approximately 3 daysand from which all of the pollen had been shed, when placed in water,closed up and in some trials swelled to t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1913
