SOME FACTORS AFFECTING THE GERMINATION OF SEED OF THE SAGUARO CACTUS (CARNEGIEA-GIGANTEA)
SOME FACTORS AFFECTING THE GERMINATION OF SEED OF THE SAGUARO CACTUS (CARNEGIEA-GIGANTEA)
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DOI：
10.2307/2439624
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发表时间：
1959-01-01
影响因子：
3
通讯作者：
KURTZ, EB
中科院分区：
文献类型：
--
作者：
ALCORN, SM;KURTZ, EB
仙人掌种子的发芽受到红光（约6550 A）或日光的刺激，远红光（约7350 A）抵消了这种效应。约0.1%在持续黑暗中发芽。当种子吸胀24小时时，单次暴露于红光是最有效的，但是在72小时的吸胀期间多次暴露于红光导致最大发芽。发芽的最适温度为25[degree]C;在15[degree]C不发芽，在35[degree]C仅轻微发芽。光处理的种子在0.05至0.2%KNO3的吸胀增加发芽。在500至1000 ppm赤霉酸中吸胀种子，增加种子在光照或黑暗中的萌发。
Germination of saguaro cactus seeds is stimulated by red light (approximately 6550 A) or daylight and far-red light (approximately 7350 A) counteracts this effect. About 0.1% germinate in continuous darkness. A single exposure to red light was most effective when the seeds were imbibed 24 hours, but maximum germination resulted from multiple exposures to red light during a 72-hour imbibition period. The optimum temperature for germination was 25[degree]C; no germination occurred at 15[degree]C and only slight germination at 35[degree]C. Imbibition of light-treated seeds in 0.05 to 0.2% KNO3 increased germination. Germination of seeds in either light or dark was increased by imbibing the seeds in 500 to 1000 ppm gibberellic acid.