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  anther
Its anther wall is composed of four layers of cells, and its tapetum is of the secretory type.
      
The plants forming additional pods in their flower (pistillody) have higher flavonol-degrading activity as compared to the anther-in-petal and doubleness mutants
      
Morphogenetic Effects of the Interaction of Floral Mutations Petal-Sepal and Anther in Petal in Papaver somniferumL.
      
The morphogenetic effects of the interaction of the floral mutations petal-sepal and anther in petal in Papaver somniferumL.
      
Onokhoiskaya) and triticale (2n= 56) using anther culture at different concentrations of 2,4-D in the growth medium were studied.
      
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A relative simple numerical of the energy balance of the ea rth-atmosphere is set up and aoplied, which is based on the Sellcrs's model(1969)considered a poait-ive feedback of H2O-greenhouse. This is expressed basically as a function of the solar constant, the planetary albedo, the transparency of the atmosphere of infrared radiation, and the turbulent exchange coefficiences for atmosphere and the oceans.Having considered a positive feedback of H20-greenhouse,the major conclusions of the analysis are that the...

A relative simple numerical of the energy balance of the ea rth-atmosphere is set up and aoplied, which is based on the Sellcrs's model(1969)considered a poait-ive feedback of H2O-greenhouse. This is expressed basically as a function of the solar constant, the planetary albedo, the transparency of the atmosphere of infrared radiation, and the turbulent exchange coefficiences for atmosphere and the oceans.Having considered a positive feedback of H20-greenhouse,the major conclusions of the analysis are that the mean globe temprature will increase by 2.1℃ comparing with the Sellers's, that a decrease of the solar constant by 1% would decrease annual average globe tempratures by 1-2℃, that a decrease of the solar constant by 3% might be sufficient to initiate anther ice age, that the sensitivity of positive feedback of ice-albedo would be decreased; and that man's increasing industrial activities may eventually lead to a much warmer global climate than today.

本文以Sellers(1969)模式为基础,加入水汽——温室效应的正反馈机制,计算地球上纬向年平均温度的稳定分布和进行一系列的敏感性试验。与Sellers的计算结果相比较后发现,加入水汽温室效应以后,全球平均温度提高了2.1℃。此外还分别考虑了太阳常数,反照率、大气减弱系数以及人类活动对气候的影响。结果指出:如果太阳辐射减少了1%,则相应的各纬圈年平均温度会减少1~2℃。当太阳常数减少到3%时才会触发极冰——反射率——温度的正反馈机制,而导致新的冰川期的形成,同时还发现加入水汽——温室效应正反馈机制以后,会使极冰——反射率——温室的正反馈机制有所收敛,并且可预测人类活动的影响能导致全球气候变暖。

Late frost injury observations on different wheat cultivars were made on March 20 ̄24, 1998 The result showed that the most sensitive period to it is between the formation of pistil and stamen primordia and the antephase of anther isolator the rate of frost injured young spike was significatly and positively correlated with wheat stem height at that period Judging by morphological classification, if a cultivar belongs to vertical leaf type, with dark green leaf and strong tillering ability, it will...

Late frost injury observations on different wheat cultivars were made on March 20 ̄24, 1998 The result showed that the most sensitive period to it is between the formation of pistil and stamen primordia and the antephase of anther isolator the rate of frost injured young spike was significatly and positively correlated with wheat stem height at that period Judging by morphological classification, if a cultivar belongs to vertical leaf type, with dark green leaf and strong tillering ability, it will has relatively higher resistance to late frost The investigations have proved that the springness form wheat has relatively stonger resistance to late frost than semiwinterness form wheat

通过对1998年3月20~24日不同小麦品种晚霜冻害的观察表明:小麦对晚霜冻害的敏感期是雌雄蕊原基形成到药隔前期之间、幼穗冻伤率与霜冻时茎节长度呈显著的正相关。从小麦形态长相划分,竖叶型、叶色深绿、分蘖力强的品种较抗晚霜冻,春性品种较半冬性品种抗晚霜冻。

The properties of the floral organs of 10 cultivars of Oryza sativa L. and their seed-setting were investigated in Yunnan. The results indicated that anther size and fertile pollen number decreased, sterile pollen increased and fertility rate declined in low temperature treatments. Fertile pollen number in the anthers was considered to be the critical factor affecting the fertility of rice. Some measures for rice breeding against cold injury are offered.

通过对 1 0个水稻品种的花器性状与结实率的分析 ,表明水稻孕穗期受低温冷害后 ,花药缩小 ,花药内可育花粉数减少 ,不育花粉数增多 ,结实率下降 ,其中花药内的可育花粉数对水稻的结实率起着决定性的作用。提出了水稻耐冷性育种的对策

 
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