香蕉芒果果皮中酶活性与炭疽病菌潜伏侵染的关系

在树上正生长发育的香蕉果实,随着果实长大,果皮中过氧化物酶(POD)和多酚氧化酶(PPO)活性不断升高。采后的香蕉和芒果果实的果皮中,POD和PPO活性变化与呼吸代谢相关。苯丙氨酸解氨酶(PAL)主要分布在果皮中,并随着果实成熟度的提高,其活性呈极显著下降趋势。感病果实的果皮中三种酶活性均比健康果皮高。说明果皮中三种酶活性的变化与炭疽菌的潜伏侵染有关。     

节镰孢的新变种和新记录

本文报道了节镰孢(Fusarium merismoides Corda)的四个变种,其中有两个新变种和两个新记录:节镰孢原变种(F.merismoides Corda var.merismoides),宽孢变种(var.crassum Wr.);两个新变种:木菠萝变种(var.artocarpi Fu et Chen,),桃生变种(var.persicicola Chert et Fu,)。对新变种作了汉文及拉丁文描述,并附有形态图及变种的检索表。     

Phototropism of Pellia: Evidence for Mediation by Auxin-stimulated Acid Efflux

Flash induced 685 nm fluorescence emission of preilluminated and dark kept Chlamydobotrys stellata has been measured under conditions of CO₂-deprivation. The difference in fluorescence intensity between dark kept and preilluminated cells is taken as a measure for the reduced state of the primary stable electron acceptor of photosystem II, Q, at the given intensity of preillumination. CO₂ removal from growing cultures of this alga for 15 min diminishes photosynthetic electron transport at the oxidizing side of this photosystem. Prolonged CO₂-absence influences also its reducing side. Measurements of flash induced oxygen yields support the conclusion that both sides of photosystem II are affected in the absence of bicarbonate.     

纯黄白鬼伞菌丝体和子实体的培养研究

纯黄白鬼伞是四川省的一个新记录种。此菌有毒 ,是一种非常美丽的观赏菌类。其菌丝无锁状联合 ,能形成大量的菌核 ,这在伞菌目中是十分罕见的。报道了纯黄白鬼伞的子实体、菌丝体的形态特性、生理特点和栽培技术。这是一种中高温性蕈菌。适宜子实体生长发育的培养料为草粉、牛粪粉、麸皮和食用菌出菇后的废科 ,瓶栽、盆栽、袋栽、床栽均可 ,不需要覆土即可出菇 ,子实体绝对生物学效率为 5%～ 7 5%。     

Thielavia heterothallica spec. nov., die perfekte Form von Chrysosporium thermophilum

Thielavia heterothallica spec. nov. is described as a heterothallic, thermophilic fungus with spherical, black, non-ostiolatecleistothecia; ellipsoidal, evanescent asci which contain eight one-celled ellipsoidal ascospores, darkening to deep brown to black, with one germ pore. The conidial state is Chrysosporium thermophilum (Apinis) von Klopotek.