Red to Far-red Ratio During Seed Development Affects Lettuce Seed Germinability and Longevity

Seed Production and Germinability of Cucurbit Crops

Cucurbit crops are mostly produced for their immature or mature fruits. However, a relatively high proportion of cucurbit fields are destined for seed production, either for seed consumption or for propagation material. Production of cucurbits for seed consumption (as a snack food) is very popular in some parts of the globe and almost unknown in others. Open-pollinated cultivars (inexpensive se...

Intrapopulation variation in Abutilon theophrasti seed mass and its relationship to seed germinability

The relationship between seed mass variation and germinability in ten Abutilon theophrasti Medic. plants from a single agricultural population was examined under controlled environmental conditions. Seeds were collected in the autumn of 1995 and dry-stored in paper bags at 4°C until the start of trials in the spring of 1998. For each plant, between 549 and 1000 randomly selected seeds were sepa...

Sunflower Resistance to the Red Sunflower Seed Weevil (Coleoptera: Curculionidae)

Quantity over quality: light intensity, but not red/far‐red ratio, affects extrafloral nectar production in Senna mexicana var. chapmanii

Extrafloral nectar (EFN) mediates food-for-protection mutualisms between plants and insects and provides plants with a form of indirect defense against herbivory. Understanding sources of variation in EFN production is important because such variations affect the number and identity of insect visitors and the effectiveness of plant defense. Light represents a potentially crucial tool for regula...

SEED DISPERSAL BY RED-RUFFED LEMURS: SEED SIzE, VIABILITY, AND BENEFICIAL EFFECT ON SEEDLING GROwTH

Frugivorous vertebrates play a critical role as seed dispersers of many tropical fruiting plants. In Madagascar, lemurs are the principal dispersers of fruit-bearing plants. This study aims to highlight the potential ecological role of the redruffed lemur (Varecia rubra) in the regeneration of a degraded forest, based on the quantity and size of passed seeds, their viability and germination, an...