The microspore was more like a tetrahedron, whilethe polar was more like a triangle. The number of microspore in every anther wasbetween 2600～3600, so the amount of pollen was quite large that it was propitiousto spread and pollination. P/O was 8088 and the breed system was singleheterosexual copulatoryb. The viability of pollen was normally above 50%. The testof pollen culture showed that the viability of pollen was up to the tiptop under thehigher temperature and lower humidity (38℃,40%),while it was weakest under thelower temperature and lower humidity (16℃,40%).The OCI is 4, and the breedsystem was belong to autocopulation. If it was heterosexual copulatory, there must beintermediums for pollination. It was recorded there were more than 40 species ofinsects on the anthotaxy or followers of Malania Oleifera. Under different weather,different living environments and different plants the frequency and rush hour of theinsects to visit the followers were different. Actions of different kinds of insect werealso different. According to the results of the observation, the form of fluid and seedof Malania Oleifera mostly rely on the action of insect pollination, especially thebees.

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The results showed that: different concentrations of sucrose and boric acid had significant impact on pollen germination, but different concentrations of calcium had no significant impact on pollen germination. It was most appropriate for tube elongation when sugar 150 gL^(-1) and boric acid 100 gL^(-1). Lack of sucrose would lead to the accumulation of callose in top of pollen tube and hold back its growth. The distribution of callose was regular in pollen tube when the medium lacked boric.

結(jié)果表明：蔗糖曰本三级片网站、硼酸濃度間對(duì)花粉萌發(fā)有顯著影響，鈣濃度間對(duì)花粉萌發(fā)的促進(jìn)作用不明顯人狠人人操人人A级片；蔗糖150 gL^(-1)免费毛片视频网址、硼酸100 mgL^(-1)時(shí)最適宜花粉管伸長；蔗糖的缺乏會(huì)導(dǎo)致胼胝質(zhì)在花粉管頂端積累免费看看a的网站，使其生長停滯成年高清视频在线看免费观看，缺硼時(shí)胼胝質(zhì)在花粉管內(nèi)分布正常。

The conversion boundary of self-incompatibility was researched by sowing by stage. Sunshine of day and temperature was studied critically by investigating leafage and researching traits indoors. The results showed that the daily minimum temperature was the principal factor of affinity conversion and the affinity conversion boundary was 16.5~18.1℃.HE97 was primarily regard as self-incompatible line in this research. The method was by inbreeding and sib HE97, Half the silk of HE97 and Zheng58. Inbreeding and cross have been done simultaneously. The extending condition of pollen tube was observed by dying the silk after pollinating 4 hours. The individuals with pollen tube were observed having seeds, while the individuals without pollen tube were observed having few seeds or no seeds. So this study regard HE97 as sporophytic self-incompatibility .The planting ration of female parent HE97 and male parent 87-1 was 4:1.The nature cross-pollination was studied by the theory of endosperm xenity, the study show that the setting percentage of HE97 was 625%, in which the seed in self was 70% and the seed in hybrid was 30%. This was consistent with the study of silk anatomy structure, then come to the same conclusion: compatible pollen germination and fertilization can stimulate the self-incompatible pollen germination and fertilization in the same corn cob.

通過分期播種国产视频91拍拍阴口，進(jìn)行了光溫敏自交不親和材料HE97親和性轉(zhuǎn)換區(qū)間的研究三级坐爱网站，依據(jù)田間跟蹤調(diào)查葉齡及室內(nèi)考種研究了HE97親和性轉(zhuǎn)換區(qū)間的光溫臨界值，結(jié)果表明：1日最低溫度是影響HE97自交不親和性的主要原因亚洲一区在线，親和性轉(zhuǎn)換區(qū)間在16.5℃～18.1℃之間被强奸的网站全集。2通過HE97自交和姊妹交以及將HE97與鄭58作為雙親谁知道黄色网址，各自的花絲一分為二，分別正反交十八禁禁禁禁污污网站，授粉后4個(gè)小時(shí)分別取其花絲進(jìn)行固定亚洲无码2011、染色，觀察花粉管的伸長情況三级片在线观看精品视频，根據(jù)結(jié)實(shí)率與花粉管伸長的對(duì)應(yīng)關(guān)系亚洲A级片在线观看，結(jié)果發(fā)現(xiàn)觀察到花粉管的對(duì)應(yīng)植株收獲到了種子，而沒有觀察到花粉管的對(duì)應(yīng)植株結(jié)實(shí)率極低或沒有結(jié)實(shí)日韩三级片免费在线播放，本研究把HE97初步劃為孢子體自交不親和類型国产黄色无码一级视频。3以HE97為母本，87-1為父本欧美一级男女插穴视频，按4母：1父行比一级做受毛片免费大片一级做一级，通過花粉直感效應(yīng)研究天然異交率，結(jié)果母本HE97結(jié)實(shí)良好(62%)亚洲国产美女精品综合久久，其中自交粒占70%av有效网站，異交粒占30%，結(jié)合花絲切片觀察表明www.精品在线观看，親和花粉的萌發(fā)及受精會(huì)導(dǎo)致落在同一果穗柱頭上不親和花粉的萌發(fā)不再受抑制一级欧美在线。

Two of these protein bands, with a molecular weight of 12 000 Mr and 14 000 Mr, showed immunoreactivity with IgE in the sera from patients with allergy to pollen of Caryota ochlandra. For the pollen extract of Carvota mitis, 30 protein bands were detected in SDS-PAGE, and three of these protein bands, with a molecular weight of 12000, 14000, and 26000 Mr, showed immunoreactivity with IgE in the sera from patients with pollen allergy of Carvota mitis. The 14000 Mr protein was the major allergen. Result from the ion-exchange chromatography indicated that the two pollen allergens (12 000、14000 Mr) from Caryota ochlandra were eluted in the second peak. The major pollen allergen of Carvota mitis was eluted in the forth and fifth peak.

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Pollen morphology of the Chinese monotypic genus Dichotomanthes and its out-group Prinsepia utilis were investigated from the point of view of pollen development. The SEM observation revealed that there is not any change in morphology and sculpture of pollen grains from the young pollen grain seperated from callose of tetraspore to the mature pollen grain in Dichotomanthes tristaniaecarpa. Only the volume of pollen grain increased with maturity.

從發(fā)育的角度研究了中國特有單種屬Dichotomanthes Kurz及與其系統(tǒng)學(xué)研究有關(guān)的外類群Prinsepia utilis的花粉形態(tài)，掃描電鏡觀察顯示Dichotomanthes花粉粒自脫離四分體胼胝質(zhì)膜開始至成熟二核花粉粒不同發(fā)育時(shí)期AV永久免费网站无毒不卡，花粉形態(tài)和外壁紋飾未見變化国产小电影免费观看，僅花粉體積隨成熟度增加而有所增大。

When there was only one pollen donor, gene flow frequency was in direct proportion to the pollen density.(8) The strong pollen competition from self-pollination might contribute to the very low outcrossing rates and gene flow frequencies in rice varieties.(9) The study of rice pollen flow showed that with the artificial disturbance of pollen dispersal there were pollen grains detected at 90 m from the pollen sources.

9對(duì)水稻花粉流的研究顯示国产无码盗摄视频，在趕粉的實(shí)驗(yàn)條件下自拍日韩欧美变态在线观看，于遠(yuǎn)離花粉源的90 m處仍然檢測(cè)到花粉分布，回歸分析顯示水稻的花粉可以傳播100 m以上色色色专区，甚至在遠(yuǎn)離花粉源的200 m的距離處仍然可能有花粉分布操人在线观看91在线，這表明水稻的花粉可以傳播非常遠(yuǎn)的距離亚洲狂插。

On the basis of pollen analysis of surface sample in North China, polynomial function analysis method was applied to establish pollen climate response surface of Pinus, Betula, Quercus, Artemisia, Chenopodiaceae, Compositae, Picea, Ephedra, Gramineae in North China, therefore an easy and applicable method for reconstructing palaeoclimate and palaeoenvironment with data of fossil pollen was founded; Multi-analysis method was applied to analyse the principal elements of surface sample pollen in central Inner Mongolia Steppe, the assemblages of surface sample pollen in steppe area and its relationship with vegetation type were discussed with helps from spore-pollen analysis of a peat section in Chasuqi, Inner Mongolia and 〓C chronometer, fossil pollen data were obtained with high resolution on the peat section in Chasuqi. Vegetation succession and environmental changes since Holocene at resolution of 70 years were primarily reconstructed in south Mount Daqingshan and Plain Tumete. The changes in the area were copmared with those in the neighbouring areas during the same period. It was found that Holocene environmental change had undergone the following stages: cold-arid, temperate-wet, warm-wet, temperate-arid and cold-arid, and the climatical optimum period occurred in 5000-4100 aB.

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Exosporium See pollen.

花粉外壁：參見 pollen。

In mixoploid plants, somatic cells with 2n=25~29 were most frequent except for a few haploid cells (2n=19) and chromosome doubling cells (2n=50~60). Abnormal chromosome behaviors were observed in pollen mother cells from mixoploid BI-1 and haploid, including chromosome bridges, laggard chromosomes, meiotic cycle asynchrony and unequal separation of chromosomes.

對(duì)混倍體植株BI-1和單倍體植株的花粉母細(xì)胞(Pollen mother cells一级α爱作爱视频免费观看，PMCs)減數(shù)分裂染色體行為觀察發(fā)現(xiàn)一级一a片，高頻率出現(xiàn)染色體落后、染色體橋日本特级黄大片、染色體分裂周期不同步黄色美女裸体网站、不均等分離等異常染色體行為。

The ancients said:"longevity in air can cause longevity", so pine pollen can be called "King of pollen." 2, full nutrition are pine-hung pine pollen-tipped stamens of the sperm cells, bears a heavy pine reproduction, which is the essence of pine, Beijing 301 Hospital of trace elements by the Research and Technical University of Munich, Germany (Europe's best-known trace elements Research Center) in cooperation of pine pollen nutrients all made the most scientific testing, during the surprise discovery of pine pollen longevity life contains all the necessary nutrients, and with a reasonable and be able to fully complement and balance the human body nutrition.

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