Objetivou-se, neste trabalho, avaliar o efeito da aplicação de herbicidas em pós-emergência sobre a eficiência fotoquímica de duas cultivares de soja (M-SOY 7908 RR e M-SOY 8001). O delineamento experimental utilizado foi em blocos ao acaso, com quatro repetições. Os tratamentos constaram da aplicação de herbicidas isolados e em misturas: lactofen, glyphosate, lactofen + chlorimuron-ethyl, chlorimuron-ethyl + imazethapyr, chlorimuron-ethyl + bentazon, glyphosate + imazethapyr, lactofen + chlorimuron-ethyl + imazethapyr e lactofen + chlorimuron-ethyl + imazethapyr/haloxyfop-methyl. Além disso, foram mantidas duas testemunhas sem aplicação de herbicida. As avaliações foram realizadas aos 4; 11; 18; 25 e 32 dias após aplicação dos herbicidas (DAA) no primeiro ano, e aos 6, 14, 21, 28 e 35 DAA, no segundo. A cultivar M-SOY 8001 foi suscetível à aplicação dos herbicidas, principalmente às misturas contendo lactofen + chlorimuron-ethyl e lactofen + chlorimuron-ethyl + imazethapyr + haloxifop-methyl, os quais provocaram redução no rendimento quântico máximo do PSII (Fv/Fm). As duas cultivares apresentaram suscetibilidade aos herbicidas quando tratados com lactofen aplicado isolado e nas misturas lactofen + chlorimuron-ethyl, chlorimuron-ethyl + imazethapyr, lactofen + chlorimuron-ethyl + imazethapyr e lactofen + chlorimuron-ethyl + imazethapyr + haloxifop-methyl com redução nos teores de clorofila, estimados pelo Medidor Portátil de Clorofilas. Os danos foram reversíveis, desaparecendo gradativamente com a idade das plantas.

The objective of this work was to evaluate the influence of post-emergency herbicide application on the photosynthetic activity of two soybean cultivars (M-SOY 7908 RR and M-SOY 8001). A randomized block experimental design was used with four replicates. Treatments consisted of applied herbicide mixtures or herbicides only: lactofen, glyphosate, lactofen + chlorimuron-ethyl, chlorimuron-ethyl + imazethapyr, chlorimuron-ethyl + bentazon, glyphosate + imazethapyr, lactofen + chlorimuron-ethyl + imazethapyr, lactofen + chlorimuron-ethyl + imazethapyr / haloxyfop-methyl. The tests included two control. The evaluations were taken after the application of herbicides at 4; 11; 18; 25 and 32 in the first crop and at 6, 14, 21, 28 and 35 DAA in the second crop. The M-SOY 8001 was susceptible the herbicides application mostly the herbicide mixture lactofen + chlorimuron-ethyl and lactofen + chlorimuron-ethyl + imazethapyr + haloxifop-methyl the herbicides caused reduction in maximum quantum efficiency of PSII (Fv/Fm). However, both varieties were susceptible to the treatments lactofen alone applied and the mixtures lactofen + chlorimuron-ethyl, chlorimuron-ethyl + imazethapyr, lactofen + chlorimuron-ethyl + imazethapyr and lactofen + chlorimuron-ethyl + imazethapyr + haloxifop-methyl with reduction in chlorophyll relative content by portable chlorophyll meter. However, these damages were reversible, disappearing gradually with plant growth.

The histochemical development is studied of the early stage of the fruit of the olive tree (Olea europaea L.) variety Picual, vigorous and of high fatty yield. Recently fecundated olive tree flowers were used and also flowers three, seven and ten days after the fertilisation. Sudan Black reaction was used for the histochemical detection of lipids in the different stages of development of the olive fruit . The result is that in the early stage of the development of the fruit, the exocarp is rich in lipids in all the study stages. The mesocarp and the embryo do not present homogeneous coloration, that is to say, there are some regions of them that present lipids. The vascular zone of the mesocarp and the endocarp are presented free of coloration and the vascular zone of the embryo in the last two study stages stays rich in lipids.

Se estudia el desarrollo a nivel histoquimico de la etapa temprana del fruto del olivo (Olea europaea L.) variedad Picual, vigorosa y elevado rendimiento graso. Para ello, se utilizaron flores de olivo recién fecundadas y también com tres, siete y diez días tras la fecundación. Hemos utilizado tinción com "Sudan Black", para hacer un seguimiento de los lípidos en las diferentes etapas de desarrollo del fruto del olivo. Como resultado se puede decir que en la etapa temprana del desarrollo del fruto, el exocarpo se presenta rico en lípidos en todas las etapas de estudio. El mesocarpo y el embrión presentan tinción no homogénea, o sea, hay algunas regiones de ellos que presentan lipidos, mientras que la zona vascular del mesocarpo y el endocarpo se presentan libre de tinción y la zona vascular del embrión se mantiene rica en lipidos.