A generalized deceptive pollination system of Doritis pulcherrima (Aeridinae: Orchidaceae) with non-reconfigured pollinaria.
A generalized deceptive pollination system of Doritis pulcherrima (Aeridinae: Orchidaceae) with non-reconfigured pollinaria.
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具有非重构花粉质的 Doritis pulcherrima（蝴蝶亚科：兰科）的广义欺骗性授粉系统
DOI：
10.1186/1471-2229-12-67
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发表时间：
2012-07-03
影响因子：
5.3
通讯作者：
Xiaoguo X
中科院分区：
文献类型：
--
作者：
Xiaohua J;Dezhu L;Zongxin R;Xiaoguo X
兰花是被子植物中最大的科之一，其花的设计和展示的多样性一直吸引着进化生物学家。兰花授粉促进异花授粉的两个最有趣的方面是花粉囊重构（PR）和欺骗性授粉。PR和广义的食物欺骗采用几乎是拮抗性的方法，促进异花授粉：PR发生通过延迟授粉，涉及相对较长的访问期间，通常观察到的传粉者的一朵花或花序;相反，广义的食物欺骗导致减少传粉者的访问期间到一朵花或花序。因此，这是合乎逻辑的假设，PR是不必要的或PR发生很快在广义的食物欺骗兰花在促进异花授粉。本研究以五唇兰为模式植物，旨在了解：（1）五唇兰的传粉繁育系统;一品红;（2）兰科植物与传粉者之间的形态学相互作用;（3）PR是否是促进兰科植物异花授粉的必要条件。结果我们的观察表明，Doritis pulcherrima几乎完全由Amegilla nigritar（膜翅目：蜜蜂科）授粉，并具有花粉沉积在这些昆虫的“枕部”（宫颈膜）。所有的证据都表明D.一品红是一种普遍的食物欺骗性兰花。我们的花和传粉者的形态测量表明，与非定向花粉器的“枕骨”的高度等于柱头和中叶表面之间的距离，这表明花粉器的重新配置是不必要的在Doritis pulcherrima. Conclusions我们的观察和分析支持的假设，花粉器的重新配置是不必要的广义食物欺骗兰花，如Doritis pulcherrima，促进异花授粉。这一结论是间接支持的欺骗性兰花，不表现出花粉囊重构丰富。热带地区附生食饵性兰花有两种促进坐果的机制（即克隆生长特性和花期长）。
BackgroundAs one of largest angiosperm families, orchids have long fascinated evolutionary biologists with their staggering diversity in floral design and display to promote outcrossing. Two of the most intriguing aspects of orchid pollination that promote cross-pollination are pollinarium reconfiguration (PR) and deceptive pollination. PR and generalized food deception employ virtually antagonistic methods of promoting cross-pollination: PR occurs through delayed pollination, involving the relatively long visitation periods that are typically observed for the pollinators of one flower or inflorescence; conversely, generalized food deception leads to reductions in the visitation periods of pollinators to one flower or inflorescence. Thus, it is logical to hypothesize that PR is unnecessary or PR happens soon in generalized food-deceptive orchids in the promotion of cross-pollination. Using Doritis pulcherrima as a model, the aim of this study was to understand the following: (1) the pollination and breeding system of D. pulcherrima; (2) the morphological interactions between orchids and their pollinators; and (3) whether PR is necessary in the promotion of cross-pollination in D. pulcherrima.ResultsOur observations indicated that Doritis pulcherrima is pollinated almost exclusively by Amegilla nigritar (Hymenoptera: Apidae) and possesses pollinia that are deposited on the “occiputs” (cervical membranes) of these insects. All of evidences are indicated that D. pulcherrima is a generalized food-deceptive orchid. Our morphometric measurements of the flowers and pollinators show that the heights of the “occiputs” with un-oriented pollinaria were equal to the distances between stigmas and surfaces of the middle lobes, suggesting that pollinarium reconfiguration is not necessary in Doritis pulcherrima.ConclusionsOur observation and analyses supported the hypothesis that pollinarium reconfiguration is unnecessary in generalized food-deceptive orchids, such as Doritis pulcherrima, for the promotion of cross-pollination. This conclusion was indirectly supported by the abundance of deceptive orchids that do not exhibit pollinarium reconfiguration. There are two mechanisms (i.e. clone-growing characteristics and a long flowering season) that promote fruit sets in the epiphytic food-deceptive orchids in tropical regions.
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影响因子：
2.4
作者：
Jin, XH
通讯作者：
Jin, XH
影响因子：
3.4
作者：
Fan, Jie;Qin, Hai-Ning;Jin, Xiao-Hua
通讯作者：
Jin, Xiao-Hua
DOI：
10.1073/pnas.1103384108
发表时间：
2011-05-03
影响因子：
11.1
作者：
Ren, Zong-Xin;Li, De-Zhu;Wang, Hong
通讯作者：
Wang, Hong
影响因子：
1.9
作者：
Borba, EL;Semir, J
通讯作者：
Semir, J
影响因子：
1.9
作者：
Johnson, SD;Steiner, KE;Vogelpoel, L
通讯作者：
Vogelpoel, L