A greenhouse pot experiment was conducted using a complete random design with six replications. A pressure-volume curve analysis was employed to study the effects of organic fertilizers on plant water relations in swe...A greenhouse pot experiment was conducted using a complete random design with six replications. A pressure-volume curve analysis was employed to study the effects of organic fertilizers on plant water relations in sweet corn (Zea mays L. cv. Honey-bantam) in terms of leaf osmotic concentration (Cs), osmotic potentials at full turgid status (πFT) and at incipient plasmolysis (πIP), and of symplastic (ζsym) and apoplastic (ζapo) fractions in the tissue water compartment in relation to photosynthetic capacity (Pc) and dry mass accumulation. At the seedling stage (day 15), plants with chemical fertilizer treatments showed lower πFT, πIP and ζapo and higher Cs, ζsym and PC than those with organic fertilizer treatments. Compared to PC and relative growth, where values from day 15 to day 75 were first lower for organic treatments and then higher, ζsym and Cs values were similar, while πFT and πIP were opposite being higher then lower. Dry mass production with organic fertilizer was higher than or close to the chemical fertilizer treatments in the later growth stage (day 75), though dry mass production with chemical fertilizers was much higher in the early and middle growing stages (days 15 and 45). Increased photosynthesis and dry mass production in later growth stages due to organic fertilizers were associated with increased osmotic concentration in the tissue and the symplastic fraction of the tissue water compartment. These might favor stomatal opening and biochemical activities.展开更多
The sugar components and their dynamic variation in the developing grains of sweet corn(Zea mays L. seccharata Sturt)and normal corn (Zea mays L. indentata Sturt) were compared. There are WSP (water-soluble polysaccha...The sugar components and their dynamic variation in the developing grains of sweet corn(Zea mays L. seccharata Sturt)and normal corn (Zea mays L. indentata Sturt) were compared. There are WSP (water-soluble polysaccharides), sucrose, fructose, glucose, mannitol and sorbitol in both sweet corn and normal corn, but no maltose. Two components with different degrees of polymerization (D. P. N) were detected in the sweet corn; only one of them was detected in the normal corn 20 days after pollination. With the development of grains, the total soluble sugar content(TSS)in sweet corn increased, but in normal corn it decreased. The dynamic variation of WSP, sucrose, glucose, fructose, mannitol and sorbitol in sweet and normal corn grains are different. The contents of sugar components in the sweet corn grains are higher than that in the normal corn. Sweet corn accumulates less starch than normal corn.展开更多
以30份甜玉米(Zea mays L. sacharata Sturt)自交系及其配制的26个杂交组合为材料,利用加性-显性遗传模型对7个主要农艺性状和9个苞叶性状进行了遗传分析。结果表明,除最长苞叶宽外,所有性状的组合间均方都达显著或极显著差异,大多数性...以30份甜玉米(Zea mays L. sacharata Sturt)自交系及其配制的26个杂交组合为材料,利用加性-显性遗传模型对7个主要农艺性状和9个苞叶性状进行了遗传分析。结果表明,除最长苞叶宽外,所有性状的组合间均方都达显著或极显著差异,大多数性状的加性方差占比大于显性方差占比,所有性状的误差方差均达显著或极显著水平;对亲本的农艺性状和苞叶性状的加性效应和显性效应值进行了预测,亲本M06的多数性状表现为显著或极显著的加性正效应,组合M06×S85的多数性状表现为显著或极显著的显性正效应;相关分析发现鲜穗重分别与净穗重、穗上叶片数、穗位叶宽、苞叶干重、苞叶总面积和苞叶平均宽呈显著或极显著正相关,净穗重分别与穗位叶宽和苞叶平均宽呈显著正相关,穗位叶长和苞叶总面积、穗位叶宽与苞叶干重呈极显著正相关。展开更多
文摘A greenhouse pot experiment was conducted using a complete random design with six replications. A pressure-volume curve analysis was employed to study the effects of organic fertilizers on plant water relations in sweet corn (Zea mays L. cv. Honey-bantam) in terms of leaf osmotic concentration (Cs), osmotic potentials at full turgid status (πFT) and at incipient plasmolysis (πIP), and of symplastic (ζsym) and apoplastic (ζapo) fractions in the tissue water compartment in relation to photosynthetic capacity (Pc) and dry mass accumulation. At the seedling stage (day 15), plants with chemical fertilizer treatments showed lower πFT, πIP and ζapo and higher Cs, ζsym and PC than those with organic fertilizer treatments. Compared to PC and relative growth, where values from day 15 to day 75 were first lower for organic treatments and then higher, ζsym and Cs values were similar, while πFT and πIP were opposite being higher then lower. Dry mass production with organic fertilizer was higher than or close to the chemical fertilizer treatments in the later growth stage (day 75), though dry mass production with chemical fertilizers was much higher in the early and middle growing stages (days 15 and 45). Increased photosynthesis and dry mass production in later growth stages due to organic fertilizers were associated with increased osmotic concentration in the tissue and the symplastic fraction of the tissue water compartment. These might favor stomatal opening and biochemical activities.
文摘The sugar components and their dynamic variation in the developing grains of sweet corn(Zea mays L. seccharata Sturt)and normal corn (Zea mays L. indentata Sturt) were compared. There are WSP (water-soluble polysaccharides), sucrose, fructose, glucose, mannitol and sorbitol in both sweet corn and normal corn, but no maltose. Two components with different degrees of polymerization (D. P. N) were detected in the sweet corn; only one of them was detected in the normal corn 20 days after pollination. With the development of grains, the total soluble sugar content(TSS)in sweet corn increased, but in normal corn it decreased. The dynamic variation of WSP, sucrose, glucose, fructose, mannitol and sorbitol in sweet and normal corn grains are different. The contents of sugar components in the sweet corn grains are higher than that in the normal corn. Sweet corn accumulates less starch than normal corn.
文摘以30份甜玉米(Zea mays L. sacharata Sturt)自交系及其配制的26个杂交组合为材料,利用加性-显性遗传模型对7个主要农艺性状和9个苞叶性状进行了遗传分析。结果表明,除最长苞叶宽外,所有性状的组合间均方都达显著或极显著差异,大多数性状的加性方差占比大于显性方差占比,所有性状的误差方差均达显著或极显著水平;对亲本的农艺性状和苞叶性状的加性效应和显性效应值进行了预测,亲本M06的多数性状表现为显著或极显著的加性正效应,组合M06×S85的多数性状表现为显著或极显著的显性正效应;相关分析发现鲜穗重分别与净穗重、穗上叶片数、穗位叶宽、苞叶干重、苞叶总面积和苞叶平均宽呈显著或极显著正相关,净穗重分别与穗位叶宽和苞叶平均宽呈显著正相关,穗位叶长和苞叶总面积、穗位叶宽与苞叶干重呈极显著正相关。
