不是很好讀的書颊艳。因為這個話題涉及的內(nèi)容已經(jīng)不是基礎(chǔ)生物學(xué)的內(nèi)容了铆惑，很多真菌生物學(xué)的知識我沒學(xué)過_(:з」∠)_ 但是既然以后要研究這個方向的話吭敢，還是硬著頭皮也讀_(:з」∠)_
【然后事實就是這里寫的太復(fù)雜了实苞。。娃循。于是我找了另外一本書的章節(jié)查看。斗蒋。淮野。】
Colonization of roots AMF
1 propagules 繁殖體
Colonization of roots by AM fungi can arise from three main sources of inoculum in
soil: spores, infected root fragments and hyphae – collectively termed propagules
1. 孢子的傳播：
1. 孢子比較大吹泡。理論上可以被風骤星、水、動物傳播（但是動物傳播沒有具體觀測到）
2. 孢子被認為是最重要的傳播途徑
1. 土里面的孢子種類和數(shù)量很多
2. 一些物種萌發(fā)的速度很慢爆哑，休眠期應(yīng)該不短洞难。所以能保存很久 Little is known about the timing of germination and infectivity of such complex communities in soil, but germination of some species may be poor or occur rather slowly and variably, providing a reservoir of inoculum which per sists for many years but may not always be important in early colonization of root systems?
3. 侵染的性能：一個特殊的實驗似乎發(fā)現(xiàn)一些菌根只能通過孢子侵染。但是這個實驗證據(jù)不足
2. 菌絲和根的侵染
1. 一般生境中這類是主要途徑
2. In many habitats, persistent hyphal networks in soil (Figures 2.1 and 2.3), together with root fragments (Figure 2.2), are the main means by which plants become colonized even when significant spore populations are also present (Hepper, 1981; Smith and Smith, 1981; Tommerup and Abbott, 1981; Birch, 1986; Jasper et al., 1992; Merryweather and Fitter, 1998c). but why?——因為地下菌絲網(wǎng)絡(luò)和植物根系網(wǎng)絡(luò)非常密集揭朝。新生植物的根率先接觸到這些菌絲和其他植物的根队贱，而提前被侵染的根就沒有機會容納孢子的產(chǎn)生了（是么色冀？）Even in highly seasonal environments, where plants may be lacking for part of the year, there is evidence that mycelial networks persist in dry or frozen soil and play an important role in colonization of new generations of plants. From a fungal perspective, the survival and spread of networks to colonize new plants is a crucial scavenging process which provides ongoing sources of organic carbon (C)
3. 菌絲網(wǎng)絡(luò)在穩(wěn)定的環(huán)境中是主要的侵染方式。但是在高擾動環(huán)境下柱嫌，菌絲網(wǎng)絡(luò)幾乎都被破壞了——免耕種植的優(yōu)勢
3. 土壤侵染力
1. 因為我們難以區(qū)分哪一個來源實現(xiàn)了侵染锋恬，所以對于一片土地，利用侵染力infectivity這個指標來表示整體的侵染能力
2. 侵染力和孢子數(shù)量難以建立穩(wěn)定關(guān)系：
1. 因為這是一個隨時變動的過程编丘。孢子的初始數(shù)量可能和區(qū)域侵染力相關(guān)聯(lián)与学，但是侵染后的植物又會產(chǎn)生新的孢子。因此對于這個動態(tài)水平建模就很困難
2. 而孢子萌發(fā)和侵染成功又是一個多變動態(tài)的過程：因此嘉抓，我們可以推測索守，物種特性，孢子的活性和休眠時間抑片，土壤中除了孢子之外的其他繁殖體的數(shù)量更能決定侵染力
3. 侵染力評估的特例：在農(nóng)田生態(tài)系統(tǒng)中卵佛，由于頻繁擾動的存在，菌絲網(wǎng)絡(luò)基本消失敞斋。這時候截汪，孢子數(shù)量和菌根碎片殘留數(shù)量和侵染力能建立良好關(guān)系
