Isospory

the formation in plants of spores of one size.

Isospory is characteristic of ferns (excluding the aquatic varieties—the salvinias, pepperworts, and azollas), horsetails, and club mosses (excluding the selaginellas). On some horsetails, smaller spores (male prothallia with antheridia) or larger spores (female, with archegonia) develop out of externally identical spores, depending on the conditions of nourishment and light. Thus, by regulating the conditions for spore germination, it is possible to alter the sex of the prothallus (physiological heterospory).

单词	isospory
释义	isospory isospory (aɪˈsɒspərɪ; ˌaɪsəʊˈspɔːrɪ) n (Botany) botany the condition of having spores of only one kind Isospory Isospory the formation in plants of spores of one size. Isospory is characteristic of ferns (excluding the aquatic varieties—the salvinias, pepperworts, and azollas), horsetails, and club mosses (excluding the selaginellas). On some horsetails, smaller spores (male prothallia with antheridia) or larger spores (female, with archegonia) develop out of externally identical spores, depending on the conditions of nourishment and light. Thus, by regulating the conditions for spore germination, it is possible to alter the sex of the prothallus (physiological heterospory).
随便看	ruleless rule line rule lines rule lob-5 rule maintenance application rule making rule markup language rule (measurement tool) ruleml rule-monger rule nms rule object logic language rule of 18 rule of 18's rule of 18s rule of 3 rule of 300 rule of 300's rule of 300s rule of 5 rule of 69 rule of 69's rule of 69s rule of 70 rule of 72

isospory

isospory

Isospory

Isospory