排序方式： 共有12条查询结果，搜索用时 15 毫秒
1.
亚洲百合与东方百合远缘杂交亲和性 总被引：1，自引：0，他引：1
为得到花色丰富、带有芳香气味、抗性强的OA或AO(O为东方百合杂种系,A为亚洲百合杂种系)型优势杂种,采用常规杂交和切割柱头的方法进行杂交,结果 AO型的22个组合,仅有亚洲百合‘Pollyanna’×东方百合‘Sambuca’这一组合得到了4个膨大的蒴果和40粒有胚种子,结实率为0.27%;85个LA(LA为Longiflorum hybrids×Asiatic hybrids的杂交后代)×O型组合均未得到完全膨大的果实和有胚种子;而21个OA型组合,有7个组合得到了膨大的蒴果及有胚种子。采用切割柱头的方法也未提高结实率,说明其没能有效克服其远缘杂交的障碍。通过花粉管荧光显微观察发现,亚洲百合和东方百合花粉几乎均能在母本的柱头上萌发,并沿着花柱道伸长生长,最终达到子房进入胚珠,说明AO型或OA型远缘杂交的受精障碍主要为受精后障碍。 相似文献
2.
3.
Zhang Qinzheng Lan Xiafua Xi Haifu Zhu Xuequn Liu Yinhua 《Journal of Agronomy and Crop Science》1991,166(2):96-100
The conversion of SO2- 4 -S and changes in content of S in various constituents in leaves of rape seedlings transplanted were investigated by using (NH4 )2 35 SO4 as a tracer to exploit formation and accumulation of glucosinolates in oilseed rape. Seedlings grown under sandy culture absorbed 35 SO2- 4 which was added to the cultural solution and incorporated into amino acids, glucosinolates and proteins rapidly. Distribution of extractable 35 S with 70 % methanol in glucosinolates in leaves declined with time from labelling, while those in amino acids rised correspondingly. Per cents of 35 S incorporated into bound form in total 35 S increased linearly and those of 35 S into glucosinolates and amino acids decreased with time within five days from labelling. After that the relative amounts of 3S S in three constituents was basically constant. Content on dry weight basis of labelled glucosinolates and amino acids expressed as μmol S/g.d.w. increased linearly with time from labelling with absorption of 35 SO2- 4 from soil by the seedlings under soil culture. Compared with seedlings grown under sandy culture, more 35 S was incorporated into glucosinolates in leaves of seedlings grown under soil culture. 相似文献
4.
用６个硫浓度的［（ＮＮ＿４）＿２￣３５ＳＯ＿４］营养液，在砂培条件下培养移栽一个月后的油菜苗，标记后两周收获植株．放射性测定结果表明，在硫浓度为１０ｍｇ·Ｌ￣（－１）和２５ｍｇ·Ｌ￣（－１）时，油菜对硫的吸收率约８７％；在５０，１００，２００ｍｇ·Ｌ￣（－１）时的吸收率为６０％左右；在４００ｍｇ·Ｌ￣（－１）时下降为４３％．供硫浓度（ｍｇ·Ｌ￣（－１））从１０增加到２５时，油菜植株中的ＳＯ形态硫增加最多，硫苷态硫增加的比例最小；供硫浓度（ｍｇ·Ｌ￣（－１））从２５增加到２００时们以ＳＯ形态硫增加最明显，氨基酸硫增加幅度最小；供硫浓度（ｍｇ·Ｌ￣（－１））从２００到４００时，植株中的各种形态的硫增加比例更小．供硫浓度１０ｍｇ·Ｌ￣（－１）时，植株内以蛋白质和硫苷为主，随着供硫浓度增加，二者的相对含量减少并趋于平衡，而后转以Ｓ０形态的硫占优势，氨基酸硫的含量与供硫浓度的关系不明显． 相似文献
5.
硫肥对油菜的增产效应 总被引：2，自引：0，他引：2
在３个地区７个点进行油菜硫肥试验。结果表明，施用硫肥比不施硫肥的油菜生长好，菜籽产量高。土壤ＳＯ—Ｓ含量在２６．０ｍｇｋｇ－１以下，施用硫铵的比对照增产１４．８％—４９．８％，达到极显著或显著水平，施用硫磺比对照增产６．５％—３４．２％，达极显著或显著水平。土壤ＳＯ—Ｓ含量＞４５．０ｍｇｋｇ－１，施硫铵、硫磺和石膏均比不施硫肥的增产，但未达显著水平。 相似文献
6.
Zhang Qinzheng Xi Haifu Lan Xiafua Zhu Xuequn Liu Yinhua 《Journal of Agronomy and Crop Science》1991,166(3):152-156
Rape plants were labelled by applying (NH4 )2 35 SO4 to soil. Changes in content of 35 S in various constituents in pods and grains were determined during siliquae development to exploit formation and accumulation of glucosinolates in oilseed rape. Content of 35 S in glucosinolates expressed as μmol S/g.d.w. and its relative amounts in extractable forms in young siliquae were in constant level within one week after flowering, but either absolute content or relative content of 35 S in glucosinolates increased largely by two weeks after flowering, thereafter the distribution of extractable 35 S in glucosinolates of siliquae and grains increased linearly as proceeding of its development, 35 S in extracts of grains almost was in form of glucosinolates after 8 weeks from flowering. Amounts of both 35 S in glucosinolates and dry matter per pod increased linearly with time after flowering. According to the changes of amounts of 35 S in other constituents per pod, it could be supposed that glucosinolates accumulated in seeds might be transported from other organs together with nutrients. 相似文献
7.
8.
晚秋给两年生未结果温州蜜柑盆栽苗饲喂~(14)CO_2,随后测定不同物候期柑桔苗各器宫的~(14)C同化物的放射性总后度、比活度、~(14)C可溶性成分及氨基酸相对含量.结果表明,在次年新器官生长前,~(14)C同化物主要由叶片向根部运转,~(14)C总活度在根系中的分配达50％以上.从标记后半个月到休眠期,所有器官包括秋叶的放射性比活度增加,唯有春叶比活度明显降低,秋叶却能从春叶中获得养价补充.次年5～11月,新梢生长动用约1/5的14C同化物,同时地上部其他器官的~(14)C分配减少约8.57％,根部减少5.45％,表明新梢生长所需养分主要来自地上部.可溶性~(14)C随年周期进程不断减少.可溶性成分中氨基酸相对含量以新器官和生长期间的器官为高.韧皮部的放射性比活度明显高于木质部,氨基酸含量也以前者为高. 相似文献
9.
盆栽条件下，用~（１５）Ｎ－尿素测定了油菜角果成熟期荚中氮的运转。于开花后三个不同时期，将~（１５）Ｎ－尿素涂布于油菜主轴基部荚的表面，植株成熟后测定不同部位荚的荚壳和籽粒的含Ｎ量和~（１５）Ｎ丰度，计算施用Ｎ的回收率，荚中为７９．１％－８４．３％，其中标记荚为７５．３％－８０．４％。开花后４周施用的Ｎ从标记荚的回收率低于开花后２周和６周施用Ｎ的回收率。吸收的尿素Ｎ大部分运转至籽粒，其分配比例随施用时期的推迟而增加。 相似文献
10.
通过测定加有黑麦草的土壤样品在不同培养时间产生的硝态氮、亚硝态氮、铵态氮和氨态氮数量的变化，研究了有机氮在二种红壤（红砂土和黄筋泥）中的矿化动态．有机氮在红壤中的矿化结果主要是铵的生成和氨的挥发，培养后５ｄ，明显发生铵的释放，红砂土在培养后１５～２０ｄ，铵的释放达到最大值，黄筋泥则是在培养后３０～３５ｄ．在培养的前２０ｄ，红砂土中铵的释放多于黄筋泥，但在３０ｄ后，情况相反．培养期间有机氮矿化释放的氨用２％硼酸溶液吸收，以这种形式损失的有机氮，红砂土多于黄筋泥 相似文献