resides in the tip; and it is the tip which transmits some influence to the adjoining parts, causing them to bend. As soon as the tip, protected by the rootcap, reaches the ground, it penetrates the surface, if this be soft or friable ; and the act of... The Power of Movement in Plants - Page 564by Charles Robert Darwin - 1897 - 592 pagesFull view - About this book
| Jane Hancox Newell - 1889 - 232 pages
...to turn." " Sensitiveness to gravitation," says Darwin, speaking of the radicle of the seedling, " resides in the tip; and it is the tip which transmits...penetration is apparently aided by the rocking or circumnutating movement of the whole end of the radicle. 1 " After the tip has penetrated the ground... | |
| Sir Patrick Geddes - Botany - 1893 - 298 pages
...less spiral course towards the ground. Darwin believed that “sensitiveness to gravitation resides in the tip, which transmits some influence to the adjoining parts, causing them to bend.” When the tip of the root reaches the soil it bores into it, aided by the continued movement of the... | |
| Jane Hancox Newell - 1895 - 232 pages
...to turn." " Sensitiveness to gravitation," says Darwin, speaking of the radicle of the seedling, " resides in the tip; and it is the tip which transmits...penetration is apparently aided by the rocking or circumnutating movement of the whole end of the radicle. 1 " After the tip has penetrated the ground... | |
| Charles Darwin - Science - 1896 - 618 pages
...less spiral course, as was seen on the smoked glass-plates. Sensitiveness to gravitation re-S sides in the tip; and it is the tip which transmits some...penetration is apparently aided by the rocking or circumnutating movement of the whole end of the rathcle. If the surface is compact, and cannot easily... | |
| Religion - 1881 - 624 pages
...548. upon by geotropism. But it is only the tip of the radicle that is sensitive' to gravitation ; ' and it is the tip which transmits some influence to the adjoining parts, causing them to bend.' 2 This same tip of the radicle is sensitive to contact. When it meets an obstacle it causes the adjoining... | |
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