Are cactus growth forms related to germination responses to light? A test using Echinopsis species

Ortega–Baes, Pablo; Aparicio-González, Mónica; Galíndez, Guadalupe; Fueyo, Patricia del; Sühring, Silvia; Rojas-Aréchiga, Mariana

doi:10.1016/j.actao.2010.02.006

Cited by 24 publications

(24 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We chose to use tetrazolium instead of seed germination since dormancy has been observed in the seeds of Echinopsis , for example, and we needed a rapid response (Ortega‐Baes et al . ).…”

Section: Methodsmentioning

confidence: 97%

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

et al. 2017

View full text Add to dashboard Cite

Three synchronopatric Cactaceae species, Echinopsis rhodotricha, Harrisia balansae and Praecereus saxicola, have mostly nocturnal anthesis and similar flowers, characteristics that motivated us to perform a comparative study of reproductive ecology. Reproductive phenology was sampled monthly from December 2014 to November 2015. We describe floral biology, breeding system via pollination treatments and evaluate floral visitors from focal and filming observations. Pollen grains found on moth proboscis were compared among cactus species under light microscopy. We used fluorescent dye particles to test intra- and interspecific pollen flow. These three species have extended flowering with greater intensity in the wet season, causing high overlap. They have white and hypocrateriformis flowers that open at twilight or nightfall and last about 15 h. H. balansae seems to be self-incompatible, while E. rhodotricha presented self-compatibility. P. saxicola presented self-fertility, but most of the population seems to be self-incompatible. We suggest sphingophily for the three species, but only P. saxicola was visited by Manduca rustica (Sphingidae). However, we observed pollen grains of all three species on the proboscis of moths, especially M. rustica and M. sexta. Prolonged anthesis allowed bees (herein considered as secondary pollinators) to visit flowers of E. rhodotricha and P. saxicola. It can be concluded that the studied species share nocturnal and diurnal pollinators, suggesting interspecific pollen flow, which, however, could not be detected with fluorescent dye particles. In view of the low frequency of primary pollinators, it appears that these three species have different reproductive strategies, ensuring the fruiting and production of viable seeds.

show abstract

“…We chose to use tetrazolium instead of seed germination since dormancy has been observed in the seeds of Echinopsis , for example, and we needed a rapid response (Ortega‐Baes et al . ).…”

Section: Methodsmentioning

confidence: 97%

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The explanations for such differential responses of seed germination to light intensity are diverse; while some studies invoke a relationship between photoblastic germination with life forms of cactus species (Rojas-Aréchiga et al 1997), or seed size (Flores et al 2006;Ortega-Baes et al 2010) other suggest phylogenetic constraints (Ortega-Baes et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Positive photoblastic response of seed germination in Eriosyce subgen: Neoporteria (Britton & Rose) Helmut Walter (Cactaceae)

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The genetic diversity in cultivated cacti is limited by the small number of progenitors and the loss of genetic variation during cultivation (Nobel 2002) and most of the domesticated cacti grown for fruit or ornamental flowers apparently originated from a relatively narrow germplasm base. In the case of Eastern cactus, over 100 distinct clones have been described, but Meier (1995) proposed that all are probably the descendants of three plants (two Hatiora gaertneri and one H. rosea).…”

Section: Introductionmentioning

confidence: 99%

“…The multiple uses and the ability of cacti to thrive in the arid and semiarid environments that other species are unable to tolerate make it of interest to breeders and molecular biologist seeking to develop crops for areas typically unsuitable for conventional agriculture (Nobel 2002). A primary breeding goal should be the expansion of the production area for cacti by developing cold-tolerant cultivars because the current highyielding fruit, vegetable and forage varieties do not survive between temperatures of -5 and -8°C (Loik and Nobel 1991;Parish and Felker 1995;Wang et al 1998).…”

Section: Introductionmentioning

confidence: 99%

The plant size and the spine characteristics of the first generation progeny obtained through the cross-pollination of different genotypes of Cactaceae

Mihalte

Sestraş

2011

Euphytica

View full text Add to dashboard Cite

The main characteristics (plant diameter, number of spine/areoles and length of spines) of 16 cactus hybrids were analysed and the genetic variability and broad-sense heritability was studied. The descendants were obtained through a cyclic crosspollination pattern, with the parental forms chosen based on aesthetic considerations. Cross-pollination among Rebutia senilis 9 Aylostera muscula, Rebutia tarvitaensis 9 Aylostera muscula, Aylostera flavistyla 9 Rebutia senilis, Rebutia senilis 9 Aylostera flavistyla, Aylostera muscula 9 Aylostera albiflora and Rebutia senilis 9 Aylostera albiflora did not succeed, whereas all of the other hand-pollinated crosses succeeded and produced viable seeds. The highest values of the analysed characters were observed in the progeny of A. fiebrigii var. densiseta 9 R. senilis and A. buiningiana 9 A. vallegardensis and the artificial selection to identify plants with special decorative traits was extremely efficient among them. In the F 1 population of the studied crosses, a large genetic diversity was found within hybrid combinations (families), between combinations and a different variation was recorded among the analysed traits. The broad-sense heritability ranged between 0.909 (plant diameter) and 0.948 (spines length). All of the characters analysed, in the present experience, have a strong genetic determinism, being greatly influenced by the genotype and to a lesser extent, by the cultivation conditions (greenhouse).

show abstract

Are cactus growth forms related to germination responses to light? A test using Echinopsis species

Cited by 24 publications

References 23 publications

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

Pollination and reproductive system of synchronopatric species of Cactaceae (Cactoideae) subject to interspecific flow of pollen: an example of ecological adaptation in the Brazilian Chaco

Positive photoblastic response of seed germination in Eriosyce subgen: Neoporteria (Britton & Rose) Helmut Walter (Cactaceae)

The plant size and the spine characteristics of the first generation progeny obtained through the cross-pollination of different genotypes of Cactaceae

Contact Info

Product

Resources

About