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Rosario's fig tree
\"Every spring the little girl who lives next door to Rosario helps him plant vegetables. One spring, Rosario plants a fig tree, which soon bears sweet purple fruit. But when fall comes, he bends it over and buries it in the ground.\"--Publisher.
Book
Leaf angle: a target of genetic improvement in cereal crops tailored for high‐density planting
Summary High‐density planting is an effective measure for increasing crop yield per unit land area. Leaf angle (LA) is a key trait of plant architecture and a target for genetic improvement of crops. Upright leaves allow better light capture in canopy under high‐density planting, thus enhancing photosynthesis efficiency, ventilation and stress resistance, and ultimately higher grain yield. Here, we summarized the latest progress on the cellular and molecular mechanisms regulating LA formation in rice and maize. We suggest several standing out questions for future studies and then propose some promising strategies to manipulate LA for breeding of cereal crops tailored for high‐density planting.
Journal Article
Cool flowers : how to grow and enjoy long-blooming hardy annual flowers using cool weather techniques
\"In Cool Flowers, cut-flower farmer Lisa Ziegler presents simple, tried-and-true techniques for today's gardener and profiles 30 of her favorite hardy annual flowers. Your reward? A cutting garden that keeps on blooming when the \"tender annuals\" are dead and gone.\"-- Provided by publisher.
Book
Implications of planting date on Benghal dayflower (Commelina benghalensis L.) and sicklepod (Senna obtusifolia L.) management in peanut
Benghal dayflower and sicklepod are weeds of economic importance in peanut in the southeastern United States due to their extended emergence pattern and limited effective herbicides for control. Field studies were conducted near Jay, Florida, in 2022 and 2023, to evaluate the effect of planting date and herbicide combinations on Benghal dayflower and sicklepod control in peanut crops. Peanut planted in June was exposed to a higher Benghal dayflower density than peanut planted in May. Sicklepod density was similar between May and June planting dates at 28 d after preemergence and early postemergence herbicide applications, but density was greater in peanut that was planted in June, 28 d after the mid-postemergence application. A preemeergence herbicide application followed by (fb) an early postemergence application of S-metolachlor or diclosulam + S-metolachlor controlled Benghal dayflower 84% to 93% 28 d after early postemergence in peanut that was planted in May, but control was reduced to 58% to 78% in the crop that had been planted in June. Regardless of planting date, a preemeergence application fb S-metolachlor or diclosulam + S-metolachlor applied early postemergence provided <80% sicklepod control 28 d after early postemergence. Imazapic + dimethenamid-P + 2,4-DB applied postemergence improved Benghal dayflower control to at least 94% 28 d after mid-postemergence, but sicklepod control was not >85%. Regardless of the planting date, paraquat + bentazon + S-metolachlor applied early postemergence was required to achieve ≥95% sicklepod control. However, herbicide combinations that included paraquat + bentazon + S-metolachlor reduced peanut yield when planting was delayed to June. In fields that are infested with Benghal dayflower and sicklepod, it is recommended that peanut be planted in early May to minimize the potential impact of these weeds and to increase peanut yield. Late-planted peanut required more intensive herbicide applications to obtain the same peanut yield as the May-planted peanut. Nomenclature: Bentazon; diclosulam; dimethenamid-P; fluridone; flumioxazin; imazapic; paraquat; S-metolachlor; 2; 4-DB; Benghal dayflower; sickelpod; Senna obtusifolia (L.) H.S. Irwin & Barneby; Commelina benghalensis L.; peanut; Arachis hypogaea L.
Journal Article
Teosinte ligule allele narrows plant architecture and enhances high-density maize yields
Increased planting densities have boosted maize yields. Upright plant architecture facilitates dense planting. Here, we cloned UPA1 (Upright Plant Architecture1) and UPA2, two quantitative trait loci conferring upright plant architecture. UPA2 is controlled by a two-base sequence polymorphism regulating the expression of a B3-domain transcription factor (ZmRAVL1) located 9.5 kilobases downstream. UPA2 exhibits differential binding by DRL1 (DROOPING LEAF1), and DRL1 physically interacts with LG1 (LIGULELESS1) and represses LG1 activation of ZmRAVL1. ZmRAVL1 regulates brd1 (brassinosteroid C-6 oxidase1), which underlies UPA1, altering endogenous brassinosteroid content and leaf angle.The UPA2 allele that reduces leaf angle originated from teosinte, the wild ancestor of maize, and has been lost during maize domestication. Introgressing the wild UPA2 allele into modern hybrids and editing ZmRAVL1 enhance high-density maize yields.
Journal Article